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Gopal001 Das
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Asked: 2025-03-07T04:48:24+00:00 In:

The potential difference V applied across a conductor is increased to 2 V with its temperature kept constant, the drift velocity of the free electrons in a conductor will

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50%(a) remains the same ( 1 voter )
0%(b) becomes half of its previous value
50%(c) be doubled of its initial value ( 1 voter )
0%(d) becomes zero
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The drift velocity (vd) of free electrons in a conductor is directly proportional to the applied potential difference (V), given by vd ∝ V. When V is doubled, vd also doubles. Hence, the correct answer is (c) be doubled of its initial value.

Class 12th Science Physics NCERT MCQ Questions
NCERT Books MCQ Questions Session 2024-2025.

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    1 Answer

    1. The drift velocity vₐ of free electrons in a conductor is given by vₐ = (eEτ) / m, where

      E = V/L. When V is doubled, E doubles, so vₐ also doubles.
      Thus, the correct answer is (c) be doubled of its initial value.

      For more visit here:
      https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/

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