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Question

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?
figure


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.

Science
Active Science
Standard VII

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