Coulomb's Law - Net Electric Force & Point Charges
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- čas přidán 19. 01. 2021
- This physics video tutorial explains the concept behind coulomb's law and how to use it to calculate the electric force between two and three point charges. This video contains plenty of examples and practice problems for students taking high school or college level physics.
Full 1 Hour 40 Minute Video:
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facts
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This video was uploaded a week ago when I just started my 2nd semester of physics and this is the first thing we are learning. Wow such a coincidence lol
SAAME
+1
Same!
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girl im in 8th grade and im expected to become coulomb himself
So helpful. My professor is just solving examples without telling us what formulas are for what beforehand and it’s frustrating. It’s nice to see a step by step explanation.
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The electrostatic costant's unit is N·m2/C2,
2:50
Finally someone pointed it out.
He actually corrects himself in 15:32.
He corrected it.
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I'm in High school and I'm learning coulomb law 😭
@@axolilembaa i also learned it in high school but you are gonna use it with more things in college
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Guys we can use this too when the Question is: q with (µC)
And the distance is with (cm)
You can write the formula :(90×q×q)÷d²
Bcz a lot of questions use (µC)and(cm)
For example : Q1=2µC , Q2=-5µC
Distance:30cm and F=?
Answer =>
(90×2×5)÷(30×30)=1N
And we can use this to make question easier :
| 10cm | 10cm |
●-----●-----●
q1=3µC q2=1µC q3=-6µC
We want to calculate F total on q2 like this: look at the distance => d12=d32
Now u can move q1 to q3 or q3 to q1
For example u want to move q3 to q1
3-(-6)=9
Now your q1=9µc and you deleted the q3 now you will just calculate Ftotal=F12=(90×9×1)÷(10×10)=8.1N to right +(8.1N)i (--->)
Now look at the difference between this and the previous question
| 10cm | 10cm |
●-----●-----●
q1=3µC q2=1µC q3=+6µC
Now like the previous question for example i like to move q1 to q3 and make a new q3
6-3=3=q3
Now i want to calculate Ftotal=F32
=(90×3×1)÷(10×10)=2.7N to left -(2.7N)i
(
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At 35:53. There was a mistake at the calculation. F2F1= 45N and F2F3=11.25N and the net charge F4= 56.25N
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