A rechargeable torch battery is labelled 3.7 V, 2600 mAh.
PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Electric Circuits · Electric Circuits
Problem
A rechargeable torch battery is labelled 3.7 V, 2600 mAh.
(a) Convert the battery’s charge capacity to coulombs.
(b) Assuming the battery can deliver its full rated charge at the stated voltage, calculate the maximum electrical work it can supply when fully charged.
(c) The torch converts 25 % of this electrical energy into visible light. Calculate the energy converted into light, expressing your answer in kilowatt-hours.