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NEET UG PHYSICS MCQ: CURRENT ELECTRICITY
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Statement-1: When a wire is stretched with in the proportionality limit such that its length becomes times that of its initial value, the resistance of wire may become times of its initial resistance.
Statement-2: The poisson's ratio of the wire's material can be .
Statement-2: The poisson's ratio of the wire's material can be .
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Correct option: A
Statement-1 is true, Statement-2 is true, Statement-2 is the correct explanation for Statement-1
Statement-1 is true, and Statement-2 is true, but Statement-2 is not the correct explanation for Statement-1. When a wire is stretched, its resistance becomes n2 times the initial resistance. Poisson's ratio can be 1/2 for some materials.
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(C) The drift velocity does not depend on the applied potential difference to the conductor.
(D) The drift velocity of electron is inversely proportional to the length of the conductor.
(E) The drift velocity increases with the increase in the temperature of conductor.
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