Prakash made a model of a house lighting circuit.
(a) Which bulb will always be on?
(b) Which bulb will never glow?
(c) Can we have only bulb B glowing in this circuit?
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Solution

(a) Bulb A is always 'ON' if the circuit is closed.

(b) Bulb C will never glow because the circuit is not complete in this case.

(c) No. Since, the switch for bulb A and B is common; when we close the switch, both bulbs A and B will start glowing.

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Question 3

Three bulbs A, B, C are connected in a circuit as shown in Figure. When the switch is ‘ON’

(a) bulb C will glow first

(b) bulb B and C will glow simultaneously and bulb A will glow after some time

(d) the bulbs will glow in the order A, B and C

Question 5

In the circuit shown below, when the switch is moved to ‘ON’ position,

(a) the bulb A will glow first.

(b) the bulb B will glow first.

(d) all bulbs will glow together.

Question 11

Will the bulb glow in the circuit shown in Fig.? Explain. What can be done to light the bulb?

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