The drift velocity of an electron is doubled if the applied electric field across the conductor is .....

three times

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doubled

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half

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four times

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Solution

The correct option is B doubled
The flow of current current is nothing but drift velocity of electrons. Since current is directly proportional to voltage applied, drift velocity of electrons will also be directly proportional to the voltage applied. And it follows Ohm's law as V = I/R. So, if voltage is doubled, current is doubled and hence the drift velocity is doubled.

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