Question

A battery has a negligible internal resistance, an Emf of 12v, and a capacity of 100Ah(ampere-hour). Calculate:

a) The total charge it can supply

b) The total energy it can transfer

c) If the battery is connected to 27watts. Calculate the energy of the lamp.

Answer 1

a) charge, $Q=It=100\times3600=360000C$

b) Energy, $E=QV=360000\times12=4320000J$

c) $E=Pt=27\times3600=97,200J$