Question

A permanent bar magnet is moving downward towards a loop of wire as shown in the figure above. Identify the direction of current induced in the wire?

• A. Clockwise, as viewed from above
• B. Counterclockwise, as viewed from above
• C. The current alternates
• D. There is no current induced in the wire
• E. The direction of the current cannot be determined from the information given here

Answer 1

The correct option is A Clockwise, as viewed from above

By Lenz's law, the direction of induced current in loop will be such that it opposes the downward motion of bar magnet, for that the upper face of loop must be south pole. Upper face will be a south pole when current flows in loop, clockwise when viewed from above.