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NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

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Drift velocity

{v_d}

varies with the intensity of electric field as per the relation

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Correct option: A

{v_d} \propto E

Option A (

{v_d} \propto E

) is correct because drift velocity is directly proportional to the electric field intensity.

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In the absence of applied potential, the electric current flowing through a metallic wire is zero because A metallic block has no potential difference applied across it, then the mean velocity of free electrons at absolute temperature

T

is In a thermocouple, which of the following statements is not true (A) The drift velocity of electrons decreases with the increase in the temperature of conductor.
(B) The drift velocity is inversely proportional to the area of cross-section of given conductor.
(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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\mathrm{quantity}\,\,\mathrm{/}\,\mathrm{quantities}

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\mathrm{is}\,\,\mathrm{/}\,\,\mathrm{are}