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NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

1 Hard

1 of 1

Application +4 | -1

The area of cross-section, length and density of a piece of a metal of atomic weight

60\, \mathrm{gm}

are

10^{-6} \mathrm{~m}^2, 1.0

\mathrm{m}

and

5 \times 10^3 \mathrm{~kg} / \mathrm{m}^3

respectively and every atom contributes one free electron. (Given Avogadro number

=6 \times 10^{23} / \mathrm{mol}

). Find the drift velocity of electrons in the metal when the current of

16 \mathrm{~A}

passes through it.

View answer and explanation

Correct option: A

2 \mathrm{~mm} / \mathrm{s}

Option A (

2 \mathrm{~mm} / \mathrm{s}

) is correct because it is the calculated drift velocity of electrons in the metal using the given parameters and Avogadro's number.

More Questions from CURRENT ELECTRICITY

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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.
Choose the correct answer from the options given below The mass of ions deposited during a given interval of time in the process of electrolysis depends on The steady current flows in a metallic conductor of non-uniform cross-section. The

\mathrm{quantity}\,\,\mathrm{/}\,\mathrm{quantities}

constant along the length of the conductor

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