i just came to the comments to say the same thing. I was on my fifth video trying to understand this concept and each video confused me more. When he said that line, I felt a sigh of relief, and was finally able to grasp the concept.
I've been trying to understand this for half an hour and I just couldn't make sense of it. I have an exam tomorrow and I am so greatful to have stumbled upon this video! The way you explained it made sense to me almost immediately!
Omg thank you so much, I was frustrated over this unit for my physics exam TOMORROW, and this video just happened to show up in my sub box. Once again, thanks :D
My teacher taught me this rule, and he used his right hand instead. This video is actually wrong. Apart from the rule in this video, just look at the first example. Yes, to oppose the change by the magnet (magnetic field goes to the left), the current must be in the direction so that it will create magnetic field that goes to the right (he explained this well). However, if the current direction is like that, then it will create magnetic field that goes to the left, thus violating Lenz's Law. If you do not believe me, try to use the usual right hand rule (fingers = magnet, thumb = current). To make the magnetic field inside the coil goes to the right, the current must be downward. (just ike giving thumbs down). It might be confusing though if you use this rule with right hand as it's kinda the opposite (fingers = current, thumb = magnet). I prefer to just use the usual right hand rule.
Your wrong because your switching back to the flow of positive charges in the middle of the problem. Since he used the flow of negative charges you must use the left hand rule, always. Using the left hand rule in the first problem to determine the direction of the magnetic field, your thumb points to the right, not to the left.
Incorrect charge moves in positive direction, according to set standards of how charge moves in a circuit, therefore you must use your right hand. Don't use your left hand.
Holes / Electrons .. heh .. Electrodynamics models needs to be replaced .. They don't understand superconductors much less hyperconductors and they cannot connect centripetal divergence to superconductivity much less hyperconductivity .. Yet.. Yet .. They now call Negative Resistance "Apparent Negative Resistance" so as not to get detoured .. On the one hand Einstein Claimed that the Aether didn't exists .. His General Relativity depends upon this . . Early 1932 Einstein releases his Unified Field Theory Paper which calls the Aether by another name .. 6 Months later Einstein retracted his UF Theory Paper saying he made a mistake .. Ooops .. He just admitted G.R. was wrong and Tesla was right ! .. It gets much better .. In 1957 Dr.'s Lee & Yang disprove U1 Symmetry Electrodynamics also called "The standard model of electrodynamics" or the Standard Model .. Dr.'s Lee & Yang's NOBEL PRIZE WINNING PAPPER PROVED that at high energy levels that their is an Asymmetry in the electrodynamics model .. What does this mean .. Well for starters that Einstein was wrong saying the speed of light was a limit .. NOT TRUE .. Another proof is in order .. The simple magnet .. Ask a college professor where is the energy from the magnetic fields coming from .. Either they will B.S. you or they will say "I duh-no" .. The force from those fields don't come from the atoms or the fields would quickly diminish and the atoms would come apart in short order ! .. The fact of the mater is that their is only one place where that energy is being harvested from and that is the Aether .. Tesla was right .. Einstein was a buffoon .. Einstein was asked who the smartest man in the world was .. He said "Tesla" .. Tesla was the very first human being to demonstrate longitudinal wave mode of conduction .. We call those kind of conductors "Superconductors" .. This is where the E & H Fields both travel in strait lines and outside the skin of the conductor .. Nikola Tesla & Gabriel Kron both created devices independent of each other that demonstrated "Negative Resistance" In other words Time Reversed Mode of operation .. James Clerk Maxwell attempted to finish his Electrodynamics theory .. When he died in 1879 he said he wasn't quite finished .. Oliver Heaviside, Wilber Gibbs & Hendrik Lorentz all wanted to dumb down the math .. There may have been 5 people in the world in that day that could actually see in their heads how triple integral maths actually worked .. Maxwell was one of the few who could see 6 integral maths in his head .. He was a bloody genius ! .. The three stogies took 4 of Maxwell's equations and tossed out 22 of his other equations to make it accessible to those at university .. Lorentz gauge theorems became much of the basis for Einstein's paper .. Oh, before I forget, It wasn't Alberts Paper .. His wife Meliva wrote the paper because Albert worked in the a patent office because he could pass the entrance exam at the University .. So from 1902 to 1909 Einstein was a patent clerk and when his wife got home she tootled Albert .. Meliva Plagurized the Paper from Henri Poincaré who wrote the paper years before .. Tesla was right when he said Albert was a mathematician and not a scientist .. Einstein didn't check his work .. So not only did he not know where Electrodynamics came from he didn't know that thermodynamics which came out of electrodynamics also wasn't correct .. The 5 laws of thermodynamics are true in some cases but not in all cases .. So now you know why a unified field theory will never exists as long as the FAS & NSF are in power .. They will never allow Einstein to be wrong .. It was because of J.P Morgan and the Tiff he had with Tesla over the Wardenclyffe Tower L.W. Transmitter .. Before I end this .. It is good to know that Paul Dirac also thought Einstein was a doofus .. He wrote a paper which Dr Lee & Yang followed up on .. Dirac actually studied all of Maxwell's Quaternion Polar Equations which better helps to make 3D models and being that Dirac was another one of those very rare genius mathematicians who could understand Maxwell's equations we now know that Asymmetric Models for Electrodynamics are required .. Ah .. But they will keep teaching the dumbed down version ..
Nicely presented, but Fleming's left-hand rule: Thumb (Thrust), First finger (Field) and seCond finger (Conventional current (opposite to actual)). Apparently, a different left-hand rule is operating.
Fleming's rule has to do with a charged particle that moves through a magnetic field and shows the direction it is deflected. This left hand rule is used to show either the North Pole of an electromagnet when current direction is known or the direction of current flow when the poles are known. The left hand rule is used for the true way current flows from negative to positive. The right hand rule is used if you follow conventional current where electrons flow from positive to negative. The left hand rule is the accurate way.
What if you wind the coil in the opposite direction so that the voltage and the current are reversed. How does the approaching North Pole magnet still generate a North Pole Lenz’s law opposing magnetic field? If the voltage is backwards and therefore the current is backwards in the coil then shouldn’t it now make a South Pole? So when a North Pole magnet approaches the coil how then does a North Pole Lenz’s law opposing magnetic field be generated in the coil in both scenarios in which scenarios 1 has a voltage and current one way and in scenario 2 the voltage and current are completely opposite to scenario 1? Good one huh?
Hello, (excuse my question but) Are you sure that the direction of the induced current is correct? It seems to me that the (for all 4 examples) current should be in the opposite direction?
It's not a mistake, since he's using the left hand rule, his thumb is pointing towards the north. If you were to use the right hand rule you'd fix it so that your thumb points from north to SOUTH so everything evens out.
***** Forget about hand rules (since they are a way of visualising the concept) just consider the law. Induced current must oppose the change in applied field. According to his picture above, conservation of energy is violated.
@@ahmedel-agroudy8326 Thankssss a lot. I really understand ur explanation Bcoz i confused a lot btween left and right hand rule. Reading ur explanation really helps me
Does this mean if I drop a magnet through a copper tube the current in the tube is reversed right after the magnet exits the bottom of tube? (assuming no change in orientation of the magnet)
Why do all the comments say it's wrong, it matches my physics text book left hand rule. Left for negative current direction, right for positive current
I use the right hand for convectional current but anyway 1.When coil in generator is Parallel to magnetic field the is an induced EMF 2.was coil moves away from the magnets up or downward the EMF if in a clockwise direction But once the wire becomes perpendicular and moves towards the magnets EMF is in anticlockwise direction BE ADVISED I MIGHT BE WRONG STILL IN HIGH SCHOOL 😊❤ OR Electron flow is opposite to direction of induced voltage so use your left to find current flow then the opposite is your current
Not gonna lie took most of the day try to solve your problem 😭 so this is how I found it yes am going to write an essay on CZcams 😂🎉 1.wire is paralle riight then it moves away from magnets 2. the induced emf trys to stop this (direction of an induced e.m.f. opposes the change causing it lenz law ) 3. so lets take faces of coil near the north pole of magnet emf will produces unlike pole on wire so south to try and stop movement of coil 4. so i used my right had role you know for the solenoid thing to figure out the direction of current (convectional) were you wrap your hand around coil , thumb points to the north 5. so i found movement of current which was clockwise ,so i was like emf is a push that what my highschool teacher said so that means emf is moving in the clockwise direction too but i think the are easier ways to find direction of induced emf but for your case ( current as electron flow ) i think EMF is opposite to direction of electron flow REMEMBER THIS INFORMATION MIGHT BE WRONG STILL IN HIGH SCHOOL
I've had 3 different teachers try and make the entire class understand this and your 5 minute lecture made them seem as useless as tits on a bull! Thank you!
This well meaning teacher incorrectly explains to students how the Law of Conservation of Energy is satisfied during electricity generation in the video below... At 1:25 he states that, "the coil operates like an electromagnet and makes it more difficult for the magnet to approach the coil..." "Makes it more difficult" is the same a saying Performs Work. What the teacher is actually saying without realizing it, is that the Magnetic Field Energy which is created around the coil (electromagnet) is performing Negative Work on the approaching magnet and reducing its Kinetic Energy - i.e. "making it more difficult for the magnet to approach the coil..." When we apply the Work-Energy Principle to the video and when we understand that Energy is the Currency required to perform Work (in any direction) which, "makes it more difficult for the magnet to approach the coil" we will conclude that Magnetic Field Energy is being created. And it is this Magnetic Field Energy which is created is responsible for performing the Negative Work "making it more difficult for the magnet to approach the coil..." Energy IS being created and the theory of conservation of energy works well in purely Newtonian Mechanics but it does NOT apply in Electromagnetism and it NEVER has. The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work done by the resultant force. Energy is the capacity for doing work. You must have energy to accomplish work - it is like the "currency" for performing work. Now what the teacher and the entire world physics community is incorrectly saying (for 197 years now) is that Work (making it more difficult for the magnet to approach the coil) CAN and IS being performed without energy - which is a violation of the Work-Energy Principle. Kind regards Thane C. Heins Ottawa, Canada thaneh@potentialdifference.ca 613.898.1131
I don't understand something here. Please do we use the RIGHT HAND GRIP RULE to determine the direction of the induced current or we use the LEFT HAND GRIP RULE?? I know of Right Hand rule not Left Hnad rule
This is always what makes it confusing. There are 2 different ways to do this and which one you use depends on what theory your class is using. The old “theory” has the flow of electricity coming out of the positive terminal. The “correct” theory has the electrons coming out of the negative terminal. What you need to do is find out which one of these theories your book or teacher is using. If it’s the old theory then you use your right hand. If it’s the new theory which has electrons flow out of the negative terminal then use your left hand for everything. They both work because left hand goes with “current” flow and right hand goes with electron flow. Confused? Don’t be, just use the hand your teacher tells you to and never use the other hand. It will work.
The line of "the magnet inside makes it difficult for the magnet outside" made me understand the entire concept. Much appreciated!!
Same here.
i just came to the comments to say the same thing. I was on my fifth video trying to understand this concept and each video confused me more. When he said that line, I felt a sigh of relief, and was finally able to grasp the concept.
True!
I've been trying to understand this for half an hour and I just couldn't make sense of it. I have an exam tomorrow and I am so greatful to have stumbled upon this video! The way you explained it made sense to me almost immediately!
love it. short sweet and to the point. just what I needed!
you're a great teacher! my physics teacher explains less than a fraction of how well you do
Very intuitive presentation covering Lenz’s Law. Thank you!
Omg thank you so much, I was frustrated over this unit for my physics exam TOMORROW, and this video just happened to show up in my sub box. Once again, thanks :D
Awesome video. Thank you for taking the time to explain a difficult concept in a simple way.
Jeez! Man i love you! That analogy that it opposes the magnet made my learning and understand 100 better!
I understood now after watching ye previous videos. Thanks so much!
The presentation was really awesome, thanks to you for that because it helps a lot.❤
Thank you! These videos are making studying for finals much easier!
After watching every lens law videos, this is the only one 😭😭 TQ❤
This is explained perfectly! Thanks for the video.
Wow ive understand this section just throught this vid! Thanks!
The first explanation I am understanding here on CZcams.
such an amazing explanation! keep it up.
This helped me alot in understanding the concept of solenoidswith magnets. Thanks alot.😀
Thank you so much for this video. I learned the right-hand rule, but all I have to do it switch the direction and I'm good to go.
My teacher taught me this rule, and he used his right hand instead. This video is actually wrong.
Apart from the rule in this video, just look at the first example. Yes, to oppose the change by the magnet (magnetic field goes to the left), the current must be in the direction so that it will create magnetic field that goes to the right (he explained this well). However, if the current direction is like that, then it will create magnetic field that goes to the left, thus violating Lenz's Law.
If you do not believe me, try to use the usual right hand rule (fingers = magnet, thumb = current). To make the magnetic field inside the coil goes to the right, the current must be downward. (just ike giving thumbs down).
It might be confusing though if you use this rule with right hand as it's kinda the opposite (fingers = current, thumb = magnet). I prefer to just use the usual right hand rule.
Your wrong because your switching back to the flow of positive charges in the middle of the problem. Since he used the flow of negative charges you must use the left hand rule, always. Using the left hand rule in the first problem to determine the direction of the magnetic field, your thumb points to the right, not to the left.
Explained in a great way!
Thank you so much this helped me IMMENSELY.
The writing of the north and south on the actual coil was the game changer for me.
Very helpful!! Thank you so much!
Thank you sir! You just helped save a grade!
This is the best explanation I’ve seen
YOU ARE A SAVIOR! THANK YOU SO MUCH!
this was amazing. i understood perfectly
😆
you are really great teacher...
That was really nice and simple way of teaching
Perfect! Thank you.
Thank you! I finally get it
You Sir are AWESOME.
thank you that was so helpful!
Incorrect charge moves in positive direction, according to set standards of how charge moves in a circuit, therefore you must use your right hand. Don't use your left hand.
kudos
man u too good at it.
It helped me a lot. thanks man!! :-)
It does help, thank you.
Awesome video thank youu
thank you.. it really helps
It helps. Thank you.
depends whether you use right hand or left hand grip rule, its the same as the first example except poles are reversed and magnet is moving away
Loved it sir..... From india
U r great thankkks , this is saved me
Thank you souch!!!!🔥
Your awesome! Thank you
Excuse me, I'm confused. Why don't we use right hand grip rule here?
he's doing it wrong. It has to be the right hand
Hes teaching in relation to the electron flow
It works the same way
Holes / Electrons .. heh .. Electrodynamics models needs to be replaced .. They don't understand superconductors much less hyperconductors and they cannot connect centripetal divergence to superconductivity much less hyperconductivity .. Yet.. Yet .. They now call Negative Resistance "Apparent Negative Resistance" so as not to get detoured .. On the one hand Einstein Claimed that the Aether didn't exists .. His General Relativity depends upon this . . Early 1932 Einstein releases his Unified Field Theory Paper which calls the Aether by another name .. 6 Months later Einstein retracted his UF Theory Paper saying he made a mistake .. Ooops .. He just admitted G.R. was wrong and Tesla was right ! ..
It gets much better .. In 1957 Dr.'s Lee & Yang disprove U1 Symmetry Electrodynamics also called "The standard model of electrodynamics" or the Standard Model .. Dr.'s Lee & Yang's NOBEL PRIZE WINNING PAPPER PROVED that at high energy levels that their is an Asymmetry in the electrodynamics model .. What does this mean .. Well for starters that Einstein was wrong saying the speed of light was a limit .. NOT TRUE ..
Another proof is in order .. The simple magnet .. Ask a college professor where is the energy from the magnetic fields coming from .. Either they will B.S. you or they will say "I duh-no" .. The force from those fields don't come from the atoms or the fields would quickly diminish and the atoms would come apart in short order ! .. The fact of the mater is that their is only one place where that energy is being harvested from and that is the Aether .. Tesla was right .. Einstein was a buffoon ..
Einstein was asked who the smartest man in the world was .. He said "Tesla" .. Tesla was the very first human being to demonstrate longitudinal wave mode of conduction .. We call those kind of conductors "Superconductors" .. This is where the E & H Fields both travel in strait lines and outside the skin of the conductor .. Nikola Tesla & Gabriel Kron both created devices independent of each other that demonstrated "Negative Resistance" In other words Time Reversed Mode of operation ..
James Clerk Maxwell attempted to finish his Electrodynamics theory .. When he died in 1879 he said he wasn't quite finished .. Oliver Heaviside, Wilber Gibbs & Hendrik Lorentz all wanted to dumb down the math .. There may have been 5 people in the world in that day that could actually see in their heads how triple integral maths actually worked .. Maxwell was one of the few who could see 6 integral maths in his head .. He was a bloody genius ! .. The three stogies took 4 of Maxwell's equations and tossed out 22 of his other equations to make it accessible to those at university .. Lorentz gauge theorems became much of the basis for Einstein's paper ..
Oh, before I forget, It wasn't Alberts Paper .. His wife Meliva wrote the paper because Albert worked in the a patent office because he could pass the entrance exam at the University .. So from 1902 to 1909 Einstein was a patent clerk and when his wife got home she tootled Albert .. Meliva Plagurized the Paper from Henri Poincaré who wrote the paper years before .. Tesla was right when he said Albert was a mathematician and not a scientist .. Einstein didn't check his work .. So not only did he not know where Electrodynamics came from he didn't know that thermodynamics which came out of electrodynamics also wasn't correct .. The 5 laws of thermodynamics are true in some cases but not in all cases ..
So now you know why a unified field theory will never exists as long as the FAS & NSF are in power .. They will never allow Einstein to be wrong .. It was because of J.P Morgan and the Tiff he had with Tesla over the Wardenclyffe Tower L.W. Transmitter ..
Before I end this .. It is good to know that Paul Dirac also thought Einstein was a doofus .. He wrote a paper which Dr Lee & Yang followed up on .. Dirac actually studied all of Maxwell's Quaternion Polar Equations which better helps to make 3D models and being that Dirac was another one of those very rare genius mathematicians who could understand Maxwell's equations we now know that Asymmetric Models for Electrodynamics are required .. Ah .. But they will keep teaching the dumbed down version ..
He is not doing anything wrong ..you please learn first basic physics, current rule and electron rule...depend people...
Amazing video!
THANK YOU SO MUCH!!!
oh thankyou jesus you have no idea how much this helped. such a simple concept yet my teacher butchered it beyond belief
Thank you sooooo muuuch!!
Yr a legend 👏🏻👏🏻
That helped alot!
THANK YOU SO MUCH
Amazinly explained
Thank you, sir! :)
This excellent explanation, student will never
well explained!
Nicely presented, but Fleming's left-hand rule: Thumb (Thrust), First finger (Field) and seCond finger (Conventional current (opposite to actual)). Apparently, a different left-hand rule is operating.
Yeah, what left hand rule is that?
Fleming's rule has to do with a charged particle that moves through a magnetic field and shows the direction it is deflected. This left hand rule is used to show either the North Pole of an electromagnet when current direction is known or the direction of current flow when the poles are known. The left hand rule is used for the true way current flows from negative to positive. The right hand rule is used if you follow conventional current where electrons flow from positive to negative. The left hand rule is the accurate way.
thank you so much i have been having trouble...........
What if you wind the coil in the opposite direction so that the voltage and the current are reversed. How does the approaching North Pole magnet still generate a North Pole Lenz’s law opposing magnetic field?
If the voltage is backwards and therefore the current is backwards in the coil then shouldn’t it now make a South Pole?
So when a North Pole magnet approaches the coil how then does a North Pole Lenz’s law opposing magnetic field be generated in the coil in both scenarios in which scenarios 1 has a voltage and current one way and in scenario 2 the voltage and current are completely opposite to scenario 1? Good one huh?
you're the reason i am passing physics... keep it up!!
let me know if you pass
this is very much helpful
much appreciated.
Is this correct: Left hand rule for generators and Right hand rule for motors when using electron flow and vice versa when using conventional flow?
Could you also do a video with the right hand rule? Thanks!
Thanks for teaching
THANKYOU SO MUCH
Knowing what makes the magnet “difficult” made it easier 😂
Thanks a lot ♥♥
Thanks!!!!!
YOU'RE AMAZING ANAZING AMAZING AMAZING AMAZING OKAYYY
thank you sir.
thanks a lot
i thank u.. 😊
TQ sir!
Make sure you switch the direction if you are using right hand rule.
Jeffer Peng - and how can we do this
Can u plz explain
Hello, (excuse my question but) Are you sure that the direction of the induced current is correct? It seems to me that the (for all 4 examples) current should be in the opposite direction?
Sean dob True! I think he made a simple mistake :(
It's not a mistake, since he's using the left hand rule, his thumb is pointing towards the north. If you were to use the right hand rule you'd fix it so that your thumb points from north to SOUTH so everything evens out.
***** Forget about hand rules (since they are a way of visualising the concept) just consider the law. Induced current must oppose the change in applied field. According to his picture above, conservation of energy is violated.
right hand rule should be used. thumb points north
@@ahmedel-agroudy8326 Thankssss a lot. I really understand ur explanation Bcoz i confused a lot btween left and right hand rule. Reading ur explanation really helps me
Does this mean if I drop a magnet through a copper tube the current in the tube is reversed right after the magnet exits the bottom of tube? (assuming no change in orientation of the magnet)
Yes. The magnet will always experience resistance
Helps aaaalot.
why does the thumb point to the right in the first casE? and to the left in the second case!?
Heavenly 😌
Bruh i really hate this y using ur left. This litrally the best vid i found
Thanks
Why do all the comments say it's wrong, it matches my physics text book left hand rule. Left for negative current direction, right for positive current
thanks
The polarity of the induced voltage can be determined by using the left-hand generator rule. how please tell me
I use the right hand for convectional current but anyway
1.When coil in generator is Parallel to magnetic field the is an induced EMF
2.was coil moves away from the magnets up or downward the EMF if in a clockwise direction
But once the wire becomes perpendicular and moves towards the magnets EMF is in anticlockwise direction
BE ADVISED I MIGHT BE WRONG STILL IN HIGH SCHOOL 😊❤
OR Electron flow is opposite to direction of induced voltage so use your left to find current flow then the opposite is your current
Not gonna lie took most of the day try to solve your problem 😭 so this is how I found it yes am going to write an essay on CZcams 😂🎉
1.wire is paralle riight then it moves away from magnets
2. the induced emf trys to stop this (direction of an induced e.m.f. opposes the change causing it lenz law )
3. so lets take faces of coil near the north pole of magnet emf will produces unlike pole on wire so south to try and stop movement of coil
4. so i used my right had role you know for the solenoid thing to figure out the direction of current (convectional) were you wrap your hand around coil , thumb points to the north
5. so i found movement of current which was clockwise ,so i was like emf is a push that what my highschool teacher said so that means emf is moving in the clockwise direction too
but i think the are easier ways to find direction of induced emf but for your case ( current as electron flow ) i think EMF is opposite to direction of electron flow
REMEMBER THIS INFORMATION MIGHT BE WRONG STILL IN HIGH SCHOOL
Why everyone say he is wrong ? , He is correct and You must use your Left hand to find the direction of induced current in the coil
King 👑
I've had 3 different teachers try and make the entire class understand this and your 5 minute lecture made them seem as useless as tits on a bull! Thank you!
Does the current flow in the opposite direction if the wire is wound in the opposite direction?
Nope.
I think, yes / opposite with the conventional current.
This is not college level, is there a video where you use magnetic flux to determine the induced current?
Aww :) Yay!
its not wrong he is using left hand with his thump to the north
but if u use right hand your thump must be to the south
so both are the same . ^_^
Z idane no thats not how that works...
why is going up? I get all the other ones except for that one
Wow
my A2 is in a week and now the thumb is pointing to the south for right hand grip rule???? hELp
This well meaning teacher incorrectly explains to students how the Law of Conservation of Energy is satisfied during electricity generation in the video below...
At 1:25 he states that, "the coil operates like an electromagnet and makes it more difficult for the magnet to approach the coil..."
"Makes it more difficult" is the same a saying Performs Work.
What the teacher is actually saying without realizing it, is that the Magnetic Field Energy which is created around the coil (electromagnet) is performing Negative Work on the approaching magnet and reducing its Kinetic Energy - i.e. "making it more difficult for the magnet to approach the coil..."
When we apply the Work-Energy Principle to the video and when we understand that Energy is the Currency required to perform Work (in any direction) which, "makes it more difficult for the magnet to approach the coil" we will conclude that Magnetic Field Energy is being created.
And it is this Magnetic Field Energy which is created is responsible for performing the Negative Work "making it more difficult for the magnet to approach the coil..."
Energy IS being created and the theory of conservation of energy works well in purely Newtonian Mechanics but it does NOT apply in Electromagnetism and it NEVER has.
The work-energy principle states that an increase in the kinetic energy of a rigid body is caused by an equal amount of positive work done on the body by the resultant force acting on that body. Conversely, a decrease in kinetic energy is caused by an equal amount of negative work done by the resultant force.
Energy is the capacity for doing work. You must have energy to accomplish work - it is like the "currency" for performing work.
Now what the teacher and the entire world physics community is incorrectly saying (for 197 years now) is that Work (making it more difficult for the magnet to approach the coil) CAN and IS being performed without energy - which is a violation of the Work-Energy Principle.
Kind regards
Thane C. Heins
Ottawa, Canada
thaneh@potentialdifference.ca
613.898.1131
bestt
I don't understand something here. Please do we use the RIGHT HAND GRIP RULE to determine the direction of the induced current or we use the LEFT HAND GRIP RULE??
I know of Right Hand rule not Left Hnad rule
This is always what makes it confusing. There are 2 different ways to do this and which one you use depends on what theory your class is using. The old “theory” has the flow of electricity coming out of the positive terminal. The “correct” theory has the electrons coming out of the negative terminal. What you need to do is find out which one of these theories your book or teacher is using. If it’s the old theory then you use your right hand. If it’s the new theory which has electrons flow out of the negative terminal then use your left hand for everything. They both work because left hand goes with “current” flow and right hand goes with electron flow. Confused? Don’t be, just use the hand your teacher tells you to and never use the other hand. It will work.
his explanation is excellent but I think induced current direction s are wrong
Electrons always move upwards towards the north (electron flow)
Electrons always move downward away from the north(convectional flow)
Solenoid coil