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In an experiment, current measured is $I = 10.0 A$ , potential difference measured is $V = 100.0 V$ , length of the wire is $31.4 c m$ and the diameter of the wire is $2.00 m m$ (all in correct significant figures). Find resistivity of the wire in correct significant figures. [Take, $π = 3.14$ , (exact)]

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detailed solution

Correct option is A

ρ=πd2V4lI=(3.14)2.00×10-32(100.0)(4)(31.4)(10.0)×10-2=1.00×10-4Ω·m (to three significant figures)

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In an experiment, current measured is I=10.0 A, potential difference measured is V=100.0 V, length of the wire is 31.4 cm and the diameter of the wire is 2.00 mm (all in correct significant figures). Find resistivity of the wire in correct significant figures. [Take, π=3.14, (exact)]

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