Two loops of wire are arranged so that a changing current in one,the primary,will induce a current in the other,the secondary.The secondary loop has twice as many turns as the primary loop.As long as the current in the primary is steady at 3 A,the current in the secondary will be:
A) 3 A.
B) 6 A.
C) 1.5 A.
D) zero.

Question

Quizplus · Accepted Answer

A steady current in the primary loop does not change over time, so it does not induce any current in the secondary loop. Induction requires a changing magnetic field, which is not present with a steady current.

Two Loops of Wire Are Arranged So That a Changing