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donjt81
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A copper bar has a constant velocity in the plane of the paper and perpendicular to a magnetic field pointed into the plane of the paper. If the top of the bar becomes positive relative to the bottom of the bar, what is the direction of the velocity ~v of the bar?
1. from right to left
2. from left to right
3. from bottom to top
4. from top to bottom
I am not sure what logic to use to approach something like this. Can someone help please?
1. from right to left
2. from left to right
3. from bottom to top
4. from top to bottom
I am not sure what logic to use to approach something like this. Can someone help please?