In the circuit shown, the bulb marked 2R has twice the resistance of the bulb marked R. Compared with bulb 2R, the current in bulb R is and its brightness compared to the other bulb, is __.

larger, dimmer

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smaller, dimmer

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smaller, brighter

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larger, brighter

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Solution

The correct option is D
larger, brighter

Owing to low resistance, the current in bulb with resistance R is larger, and hence it glows more brightly in comparision to the bulb with resistance 2R.

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