The phase angle between e.m.f. and current in LCR series ac circuit is(a) 0 to π / 2(b) π / 4(c) π / 2(d) π
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answer : option (c) π/2
explanation : standard equation of emf in LCR series ac circuit is given by,![E=E_0sin(\omega t+\Phi) E=E_0sin(\omega t+\Phi)](https://tex.z-dn.net/?f=E%3DE_0sin%28%5Comega+t%2B%5CPhi%29)
where
Phase angle of emf .
again, standard equation of current in LCR series ac circuit is given by,![I=I_0sin(\omega t+\Phi+\pi/2) I=I_0sin(\omega t+\Phi+\pi/2)](https://tex.z-dn.net/?f=I%3DI_0sin%28%5Comega+t%2B%5CPhi%2B%5Cpi%2F2%29)
where
is phase angle of current.
here , it is clear that, Phase angle between emf and current is π/2
explanation : standard equation of emf in LCR series ac circuit is given by,
where
again, standard equation of current in LCR series ac circuit is given by,
where
here , it is clear that, Phase angle between emf and current is π/2
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