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NEET UG PHYSICS MCQ: CURRENT ELECTRICITY

1 Easy

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Application +4 | -1

If negligibly small current is passed though a wire of length

15 \mathrm{~m}

and resistance of

5 \Omega

, having uniform cross section of

6 \times 10^{-7} \mathrm{~m}^2

, then coefficient of resistivity of material is

View answer and explanation

Correct option: B

2 \times 10^{-7} \Omega-\mathrm{m}

Option B (

2 \times 10^{-7} \Omega-\mathrm{m}

) is correct because it is calculated using the formula for resistivity:

R = \rho \frac{L}{A}

.

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