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NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

1 Easy

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Analyzing +4 | -1

If 12 resistors of

12\, \Omega

each are connected in each edge of a cubical circuit then effective resistance across any of its edge is :-

View answer and explanation

Correct option: C

7\, \Omega

The correct answer is C (

7 \, \Omega

). The effective resistance across an edge of a cube with resistors on each edge can be calculated using symmetry and Kirchhoff's laws.

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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

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(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}