The expected answers were:

- (i) R1 and R2 in series, RT = R1 + R2

(ii)R1 and R2 in parallel

RCD =

- RAB =

=

= 6Ω

RT = 4Ω + 6Ω

= 10Ω

IS =

= 1A

I =

= 0.4A

V = IS x 4 Ω = (1 x 4)V

= 4V

For this question, three important theorems of circuit theory were required; namely: equivalent resistance for resistors connected in parallel and in series, Ohm’s law, and the current divider law. The question was popular. The performance was very encouraging.

Many candidates gave excellent responses to the question.