(a)[1]
Calculate the total resistance of the two resistors in series.
(b(i))[3]
Calculate the potential difference (p.d.) across the 20 Ω resistor.
(b(ii))[2]
On Fig. 9.2, draw the way the student attaches the voltmeter. Make sure you use the correct circuit symbol for the voltmeter.
(c)[1]
Suggest a value for the resistance of the two resistors when they are connected in parallel.