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An alternating e.m.f. of 200 V and 50 cycles is connected to a circuit of resistance 3.142Ω and inductance 0.01 H. The lag in time between the e.m.f. and the current is

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1.5 ms
2.5 ms
3.5 ms
None of these

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detailed solution

Correct option is B

tanθ=XLR=1     ∴θ=450t=θ×Time period 360

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