(a(i))[1]
State the name given to component X.
(a(ii))[1]
On Fig. 8.1, add the symbol for this voltmeter so that it is connected in the circuit.
(b)[3]
On Fig. 8.2, sketch a line that shows how the current measured by the ammeter depends on the p.d. across the $20\,\Omega$ resistor.
(c(i))[1]
State how the combined resistance of the two resistors in parallel compares with the resistance of each resistor separately.
(c(ii))[1]
A second line could be added to Fig. 8.2 to show how the current measured by the ammeter depends on the p.d. across the two resistors in parallel. State how the second line is different from the original line. You do not need to draw the second line.