The drift velocity of electrons for a conductor connected in an electrical circuit is $V_{d}$ . The conductor is now replaced by another conductor with same material and same length but double the area of cross-section. The applied voltage remains same. The new drift velocity of electrons will be:
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Question

The drift velocity of electrons for a conductor connected in an electrical circuit is $V_{d}$ . The conductor is now replaced by another conductor with same material and same length but double the area of cross-section. The applied voltage remains same. The new drift velocity of electrons will be:

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G1 Physics · Accepted Answer

Drift velocity v(d) = eEτ/m. For the same material and same length under the same applied voltage, E is unchanged, so drift velocity remains unchanged.