NEET 2009 Physics question

Power dissipated in an LCR series circuit connected to an a.c source of emf is:

Answer: (4)

Solution

Average power in a series LCR circuit: , where and (taking as the rms emf). \dfrac{ε^2 R}{Z^2}\dfrac{ε^2 R}R^2$

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Question ID VK-090159