Question

56. A battery is charged at a potential of 15 V for
8hours when the current flowing is 10 A. The
battery on discharge supplies a current of 5A
for 15 hours. The mean terminal voltage during
discharge is 14 V. The Watt-hour efficiency of
the battery is
on​

Answer 1

Answer:

subtract the first hour potential from the second one,i.e., 15-8 = 7