Question

Which of the following circuits will light up the bulb?

Answer 1

Answer:

i that is b. If not i dont know

Answer 2

Circuit B and C will light up the bulb.

• The flow of current in the circuit is complete when electrons start from one terminal and reach the other terminal without any hindrance.
• If the electrons do not reach the other terminal, the circuit does not get complete.
• In the first case, any glowing object or ammeter will show the presence of current while in the second case, the current will be shown as absent.
• Comb in circuit A and Wood in Circuit D are poor conductors of electricity. Hence, electrons will not flow and the circuit will not be complete. Thus, the bulb will not glow.
• In circuit B, connecting item is a nail and in circuit C, the connecting item is graphite in a pencil.
• Both are good conductors of electricity and thus bulb will glow due to the presence of current.

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