- Most of the candidates got the answer wrong because they did not know the simple formulae; V = IR and H = IVt. The required solution to a(i) is
V = lR
R = l0, V = 12
I = V = 12 = 1.2 Amperes
R 10
The required solution to a(ii) is
H = IV t
I = 1.2
V = 12
t = 5
H = 1 . 2 x 12 x 5
= 72 joules.
- This part of the question did not pose much problem to the candidates.