Question

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

Answer 1

answer : option (c) π/2

explanation : standard equation of emf in LCR series ac circuit is given by, $E=E_0sin(\omega t+\Phi)$

where $(\omega t +\Phi)$ Phase angle of emf .

again, standard equation of current in LCR series ac circuit is given by, $I=I_0sin(\omega t+\Phi+\pi/2)$

where $(\omega t+\Phi+\pi/2)$ is phase angle of current.

here , it is clear that, Phase angle between emf and current is π/2