Q.

A square loop is placed near a long straight current carrying wire as shown. Match the following table.

Question Image

 

Table-1

Table-2

(A)If current is increased(P)Induced current in loop is clockwise
(B)If current is decreased(Q)Induced current in loop is anticlockwise
(C)If loop is moved away from the wire(R)Wire will attract the loop
(D)If loop is moved towards the wire(S)Wire will repel the loop

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a

AR,SBQ,R,CP,Q,DP,S

b

AQ,SBQ,P,CS,R,DP,R

c

AQ,SBP,R,CP,R,DQ,S

d

AR,SBQ,R,CP,R,DQ,S

answer is D.

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Detailed Solution

A) If current is increased, Magnetic field also increases in inward direction. Thus, induced current in loop is in anticlockwise and wire will repel the loop.

B) If current is decreased, Magnetic field also decreases in inward direction. Thus, induced current in loop is in clockwise and wire will attract the loop.

C) If loop is moved away from the wire, Magnetic field decreases in inward direction. Thus, induced current in loop is in clockwise and wire will attract the loop.

D) If loop is moved towards the wire, Magnetic field increases in inward direction. Thus, induced current in loop is in anticlockwise and wire will repel the loop.

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