A square loop of wire is pulled to the left (at a constant speed) away from a lo

Question

A square loop of wire is pulled to the left (at a constant speed) away from a long straight vertical wire with current directed upwards as shown in the diagram.

13) What describes the current induced in the loop?

a) it is clockwise and decreasing as the loop moves left

b) it is clockwise and increasing as the loop moves left

c) it is counter-clockwise and decreasing as the loop moves left

d) it is counter-clockwise and increasing as the loop moves left

e) it is zero and constant

A square loop of wire is pulled to the left (at a constant speed) away from a long straight vertical wire with current directed upwards as shown in the diagram. 13) What describes the current induced in the loop? a) it is clockwise and decreasing as the loop moves left b) it is clockwise and increasing as the loop moves left c) it is counter-clockwise and decreasing as the loop moves left d) it is counter-clockwise and increasing as the loop moves left e) it is zero and constant

Explanation / Answer

According to Lenz's law the direction of induced emf or induced current in a closed circuit is such that it opposes the original cause that producec it.

Thus from Lenz's law the direction of induced current is counter-clock wise and decreases as the loop moves to the left.

Hence the correct option is (C).

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