The only hint to their force being correct is that the left hand rule is about the force on the current only. What isn't specified in this is that the wire is held in place. If the wire is held in place, then the only observable force is the reaction force of the cradle to pushing the wire upwards, causing the cradle to be pushed down
The left-hand rule is a flow of conventional current which is positive but electrons flow in the wire so the force would be acting downwards not upwards as you stated right?
The Diagram shows the flow of conventional current. The reason for Damian's confusion is that the force on the *wire* is upwards, so the Newton's Third Law reaction force on the cradle is downwards.
force on wire is upward so force act on cradle would be downward
The only hint to their force being correct is that the left hand rule is about the force on the current only. What isn't specified in this is that the wire is held in place. If the wire is held in place, then the only observable force is the reaction force of the cradle to pushing the wire upwards, causing the cradle to be pushed down
Wouldn't the upward force be acting on the wire? And so the reaction force on the cradle would be downwards?
Bit slow but great video, I like how you structured it (including the before and after rather than just the experiment). Thanks!
Thanks
What was the set voltage you used?
The left-hand rule is a flow of conventional current which is positive but electrons flow in the wire so the force would be acting downwards not upwards as you stated right?
no, current drawn on diagrams always refers to the positive conventional current unless stated otherwise.
The Diagram shows the flow of conventional current. The reason for Damian's confusion is that the force on the *wire* is upwards, so the Newton's Third Law reaction force on the cradle is downwards.