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Electric Circuit

Why does the ...

Question

Why does the bulb glow brighter when it is powered by two cells rather than one?

A

The flow of electricity in circuit is less

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B

The flow of electricity in the circuit is the same

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C

The flow of electricity stops

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D

The flow of electricity in the circuit is more

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Solution

The correct option is D The flow of electricity in the circuit is more
More chemical energy is converted to electrical energy when two cells are used. Consequently, the flow of electric current is more. Hence, the bulb glows brighter.

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Q. Bulb connected to a series combination of three dry cells glows brighter than the same bulb when connected to a parallel combination of three similar dry cells.

Q. Study the circuit given below.
figure

If a second cell is connected in series with the first cell, what would happen to bulbs 1 and 2?
(a) They will continue to glow as before.
(b) Bulb 1 will glow brighter as it is closer to the cell.
(c) Bulb 2 will become dimmer.
(d) Both will glow brighter than before.

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