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Q.

The diagram given below shows a solenoid carrying time varying current l=l0t. On the axis of the solenoid, a ring has been placed. The mutual inductance of the ring and the solenoid is M and the self inductance of the ring is L. If the resistance of the ring is R then maximum current which can flow through the ring is

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a

MI0R

b

M+Ll0R

c

2M+Ll0R

d

2M-LI0R

answer is B.

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Detailed Solution

ϕ=MI=MI0t

Hence, induced emf  e=dϕdt=MI0

Current through ring =eR=MI0R

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