current-electricity Question 33
Question: Q. 11. (i) Derive an expression for drift velocity of free electrons.
(ii) How does drift velocity of electrons in a metallic conductor vary with increase in temperature ? Explain.
U [Delhi I, II, III 2016]
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Solution:
Ans. (i) When a potential difference is applied across a conductor, an electric field is produced and free electrons are acted upon by an electric force
(ii) Decreases, as time of relaxation decreases.
[CBSE Marking Scheme, 2016]
