Questions
The adjoining figure shows two bulbs B1 and B2 resistor R and an inductor L. When the switch S is turned off
detailed solution
Correct option is C
Emf is induced in inductor, which opposes the decrease in current due to Lenz's law, therefore current does not become zero rapidly and bulb B2 dies out with some delay. On the other hand bulb B1 and resistance R, constitute a simple R circuit , in which as the voltage becomes zero, current becomes zero and B1 dies out promptly.Talk to our academic expert!
Similar Questions
Two different coils have self-inductance mH, . The current in one coil is increased at a constant rate. The current in the second coil is also increased at the same rate. At a certain instant of time, the power given to the two coils is the same. At that time the current, the induced voltage and the energy stored in the first coil are and respectively. Corresponding values for the second coil at the same instant are and respectively. Then
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