## Mastering Physics Solutions: Induced Current in a Metal Loop Conceptual Question

Induced Current in a Metal Loop Conceptual Question

Part A = counterclockwise
Part B = counterclockwise
Part C = zero
Part D = zero
Part E = clockwise

Solutions Below:

For each of the actions depicted below, a magnet and/or metal loop moves with velocity v (v is constant and has the same magnitude in all parts). Determine whether a current is induced in the metal loop. If so, indicate the direction of the current in the loop, either clockwise or counterclockwise when seen from the right. The axis of the magnet is lined up with the center of the loop.

Part A

For the action depicted in the figure, indicate the direction of the induced current in the loop clockwise, counterclockwise or zero, when seen from the right, that is, from the side the magnet is approaching to).

counterclockwise

Part B

For the action depicted in the figure, indicate the direction of the induced current in the loop (clockwise, counterclockwise or zero, when seen from the right, that is, from the side the magnet is moving away from).

counterclockwise

Part C

For the action depicted in the figure, indicate the direction of the induced current in the loop clockwise, counterclockwise or zero, when seen from the right, that is, from the side where the magnet is).

zero

Part D

For the action depicted in the figure, indicate the direction of the induced current in the loop (clockwise, counterclockwise or zero, when seen from the right, that is, from the side the magnet is moving away from).

zero

Part E

For the action depicted in the figure, indicate the direction of the induced current in the loop clockwise, counterclockwise or zero, when seen from the right, that is, from the side where the magnet is).

clockwise

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### 2 Responses to Mastering Physics Solutions: Induced Current in a Metal Loop Conceptual Question

1. furqan says:

you have mentioned the answers .. can u plz explain the reason ???

• Mastering Physics Solutions says:

You can use the right hand rule with this type of problem. Your thumb should point in the direction of the velocity (of the north end of the magnet) and the direction your fingers curl tells you the direction of the current. The trick to this question is that it asks you to give the direction of the current from a certain perspective. If current is moving in a clockwise circle on the left side of the loop, it will be counter clockwise on the right side.