Question 8
(8) A. Three identical light bulbs, A, B, C and D are connected as shown on Figure 6 on the right.
(i) A switch S is placed along the circuit such that when S is closed, all the bulbs will light up but when S is opened, only bulbs A and D will light up. On the circuit, locate the possible location of S by placing a slash (/) on it. [1 mark]
(ii) When switch S is closed, identify which light bulb/bulbs will be the [2 marks]
a. brightest
b. least bright
B. Study the circuit diagram (Figure 7) on the right carefully. All bulbs are identical.
(i) When switches S1 and S2 are closed, identify which of the bulbs will be brightest? [1 mark]
(ii) In the diagram, when both switches S1 and S3 are closed and S2 remain open, identify which of the bulb(s) will NOT light up? [1.5 marks]
(i) A switch S is placed along the circuit such that when S is closed, all the bulbs will light up but when S is opened, only bulbs A and D will light up. On the circuit, locate the possible location of S by placing a slash (/) on it. [1 mark]
(ii) When switch S is closed, identify which light bulb/bulbs will be the [2 marks]
a. brightest
b. least bright
B. Study the circuit diagram (Figure 7) on the right carefully. All bulbs are identical.
(i) When switches S1 and S2 are closed, identify which of the bulbs will be brightest? [1 mark]
(ii) In the diagram, when both switches S1 and S3 are closed and S2 remain open, identify which of the bulb(s) will NOT light up? [1.5 marks]