First slide

Alternating Current and voltage

Question

The instantaneous values of current and emf in an ac circuit are $I = 1 / \sqrt{2} \sin 314 t$ amp and $E = \sqrt{2} \sin (314 t - π / 6) V$ respectively. The phase difference between E and I will be

Moderate

A

$- π / 6 rad$
B

$- π / 3 rad$
C

$π / 6 rad$
D

$π / 3 rad$

Solution

Phase difference relative to the current $φ = (314 t - \frac{π}{6}) - (314 t) = - \frac{π}{6}$

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