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  4. In a series LCR circuit R=10 Ω and impedance Z=20 Ω. Then the phase difference between the current and the voltage is

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Q. In a series LCR circuit $R=10\,\Omega$ and impedance $Z=20\,\Omega$. Then the phase difference between the current and the voltage is

KCETKCET 1999Electromagnetic Induction

Solution:

cos $\phi = \frac{R}{Z} = \frac{10}{20} = \frac{1}{2} \, i.e. \, \phi = 60^\circ$