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AP® Physics 1 & 2

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Moderate

Most Induced Current

APPH12-ZHZEB9

Three different rigid wire loops are all released from rest and from the same height into a uniform external magnetic field. The external magnetic field is directed into the page, as shown in the diagram. All the wire loops have equal thickness and length of wire, giving them all equal mass.

Which wire loop will have the largest induced current as it first enters the external magnetic field, and why?

A

Loop A will have the most current because the length of wire perpendicular to the velocity is the greatest.

B

Loop B will have the most current because the length of wire parallel to the velocity is the greatest.

C

Loop C will have the most current because the total area enclosed by the wire is the greatest.

D

All loops will have the same induced current because all wires have the same total resistance.