A pair of coils of turns n 1 and n 2 are kept close together. Current passing through the first is reduced at the rate r and emf 3 mV is developed across the other coil. If the second coil carries current which is then reduced at the rate 2r, then the emf produced across the first coil will be
A
B
C
6 mV
D
Text Solution
Verified by ExpertsThe correct answer is:
C
, when rate of change of current is doubled, induced emf also becomes two times. Thus, emf produced across the first coil is 6 mV.
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