NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

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Analyzing +4 | -1

An ammeter and a voltmeter of resistance

R

are connected in series to an electric cell of negligible internal resistance. Their readings are

A

and

V

respectively. If another resistance

R

is connected in parallel with the voltmeter

View answer and explanation

Correct option: D

A

will increase and

V

will decrease

Option D (

A

will increase and

V

will decrease) is correct because adding a parallel resistance to the voltmeter decreases the overall resistance, increasing the current and decreasing the voltage reading.

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

constant along the length of the conductor

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