Q.

Magnetic flux in a circular coil of resistance 10Ω changes with time as shown in figure. Direction of magnetic field is perpendicular to paper inwards.

Match the following table.

Question Image

Table-1

Table-2

(A)At 1 s induced current is(P)

Clockwise

(B)At 5 s induced current is(Q)

Anticlockwise

(C)At 9 s induced current is(R)

Zero

(D)At 15 s induced current is(S)

2A

  (T)

None

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a

AQ,SBQ,R,CP,R,DP,S

b

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

c

AP,SBQ,R,CS,R,DQ,S

d

AQ,SBR,CP,S,DQ,S

answer is C.

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Detailed Solution

At 1 s, inward magnetic field is increasing. Hence, induced current will produce outward magnetic field. Therefore, induced current is anticlockwise.At 5 s, flux is constant. Hence, induced current is zero. At 9 s, outward magnetic field is increasing. Hence, induced current will produce inward magnetic field. Or the induced current is clockwise.

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