Question

If the EMF of a cell is 1.5 V, then the energy provided by the cell to drive 0.5 C of charge around the circuit : 

(A) 1 J 

(B) 0.75 J 

(C) 0.5 J 

(D) 0.25 J

Answer 1

(B) 0.75 J 

Energy = work done (w) = vq 

w = 1.5 x 0.5 

= 0.75J