NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

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The e.m.f. of a cell is 6 volt. When 2 ampere current is drawn from it then the potential difference across its terminals remains 3 volt. Its internal resistance wil be:

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Correct option: A

1.5 \Omega

Option A (

1.5 \Omega

) is correct because the internal resistance can be calculated using the formula r = (E-V)/I.

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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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(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}