Two alternating voltages have identical peak value and the same frequency

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two alternating voltages have identical peak value

240\,\text{V}

and the same frequency. At

t=0

, the first voltage is zero and increasing positively, while the second is

+168\,\text{V}

. Approximately how many degrees does the second voltage lead the first? (a)

30^{\circ}

(b)

60^{\circ}

(c)

44^{\circ}

(d)

90^{\circ}