A series circuit carries a constant current of supplied by a source whose emf varies…

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

A series circuit carries a constant current of

0.25\,\text{A}

supplied by a source whose emf varies with time according to

\varepsilon(t)=12\,\text{V}+3\,\text{V}\cdot\sin(\omega t)

. Two resistive elements in the circuit maintain steady potential drops of

5\,\text{V}

and

4\,\text{V}

, respectively. Ignoring any other elements, what is the average power delivered by the source to the circuit over one complete cycle of

\sin(\omega t)

? (a)

2.3\,\text{W}

(b)

3.8\,\text{W}

(c)

3.0\,\text{W}

(d)

0.75\,\text{W}