The instantaneous expressions for voltage and current in an A.C

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

The instantaneous expressions for voltage and current in an A.C. circuit are

v=220\sqrt{2}\,\sin(314 t)

V and

i=10\sqrt{2}\,\sin\bigl(314 t-\tfrac{\pi}{6}\bigr)

A. Calculate the time by which the current lags behind the voltage.