Questions
An inductor having self inductance L and resistance R is connected across a battery of emf . When the current is in steady state, at t = 0 an iron rod is inserted into the inductor. Then after insertion of the rod, current in the circuit
detailed solution
Correct option is D
When the iron rod is inserted, inductance of coil is changed abruptly, flux in it remains same i.e. ϕ=Li=constant, so current will decrease. Now current will increase with time to attain the steady value εR.Talk to our academic expert!
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In the circuit shown, one of the inductors used is ideal. The potential difference across the batteries is10 V. The current drawn from the battery at steady state, after the switch is closed is
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