A Straight Wire Lies Along the Y-Axis Initially Carrying a Current

Multiple Choice

A straight wire lies along the y-axis initially carrying a current of 10 A in the positive y-direction.The current decreases and reverses to 10 A in the negative y-direction,the change in current happening at a uniform rate.In the 1st quadrant a square conducting coil has 2 sides parallel to the y-axis and the other 2 sides parallel to the x-axis.The side of the coil nearest and parallel to the straight wire is at a distance equal to the length of one of the sides of the square.As the current is going from 10 A in one direction to 10 A in the other,in which direction is the induced current in this side of the square coil nearest to the straight wire?

A) It is in the positive y-direction.
B) It is in the negative y-direction.
C) At first it is in the positive y-direction,but after the current passes through zero,it is in the negative y-direction.
D) At first it is in the negative y-direction but after the current passes through zero,it is in the positive y-direction.