A cell passes a current of 2.0 A in a circuit for 30 s
PHYSICS · Single correct · A Level · Physics · Electricity · Electricity
Problem
A cell passes a current of 2.0 A in a circuit for 30 s. In this time, the cell transfers 120 J of energy.
What is the electromotive force (e.m.f.) of the cell?
(A) 0.50 V
(B) 1.5 V
(C) 2.0 V
(D) 8.0 V