A portable device operates on a battery that stores of energy when fully charged

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

Problem

A portable device operates on a

9.0\,\text{V}

battery that stores

5.0\,\text{kJ}

of energy when fully charged. The device draws a steady current of

0.20\,\text{A}

. Approximately how long can the device run before the battery is completely discharged? (a)

7.7\,\text{min}

(b)

2.8\,\text{h}

(c)

46\,\text{min}

(d)

23\,\text{min}