A power bank stores 37 kJ of energy when fully charged
PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A power bank stores 37 kJ of energy when fully charged. It is used to run a portable speaker that draws a steady current of 0.5 A at 5 V. Calculate the maximum time, in minutes, for which the speaker can operate before the power bank is exhausted.