Two identical concentric loops are arranged as shown in the diagram below. Loop 1 initially carries a steady current driven by the power supply shown. In the situation described in problem E19T.7, will the two loops briefly attract or repel each other as the current in loop 1 decays to zero?

Suppose that when we turn off the power supply, it takes a small but finite time for the current to decay to zero in loop 1. In what direction does the current induced in loop 2 flow during this time interval?
A) They attract each other.}
B) They repel each other.
C) They neither attract nor repel each other.
D) One needs more information to answer.

Question

Two identical concentric loops are arranged as shown in the diagram below. Loop 1 initially carries a steady current driven by the power supply shown. In the situation described in problem E19T.7, will the two loops briefly attract or repel each other as the current in loop 1 decays to zero?

Suppose that when we turn off the power supply, it takes a small but finite time for the current to decay to zero in loop 1. In what direction does the current induced in loop 2 flow during this time interval?
A) They attract each other.} 
B) They repel each other. 
C) They neither attract nor repel each other. 
D) One needs more information to answer.

Quizplus · Accepted Answer

The Answer of Two identical concentric loops are arranged as shown in the diagram below. Loop 1 initially carries a steady current driven by the power supply shown. In the situation described in problem E19T.7, will the two loops briefly attract or repel each other as the current in loop 1 decays to zero?

Suppose that when we turn off the power supply, it takes a small but finite time for the current to decay to zero in loop 1. In what direction does the current induced in loop 2 flow during this time interval?
A) They attract each other.} 
B) They repel each other. 
C) They neither attract nor repel each other. 
D) One needs more information to answer.

Two Identical Concentric Loops Are Arranged as Shown in the Diagram