Question

During the charging of a storage battery, the current I is 20 A and the voltage E is 12.8 V.

The rate of heat transfer from the battery is 16 W. At what rate is the internal energy

increasing?​

Answer 1

Here, Voltage, V= 12.8 V
          Current, I = 20 A
          Power, P=?
we know,
power = V × I = 12.8 × 20 = 256 W
The rate of heat transfer from battery is 16 W.
So, the internal energy increasing at the rate of 256÷16=16 W