PhysicsNEET 2023Ohm's law, resistivity, temperature dependence

Current Electricity

The resistance of a platinum wire at $0^{\circ}$ C is $2Ω$ and $6.8Ω$ at $8 0^{\circ}$ C. The temperature coefficient of resistance of the wire is:

A. $3 \times 1 0^{- 4}^{\circ} C^{- 1}$
B. $3 \times 1 0^{- 3}^{\circ} C^{- 1}$
C. $3 \times 1 0^{- 2}^{\circ} C^{- 1}$ ✓
D. $3 \times 1 0^{- 1}^{\circ} C^{- 1}$

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

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Last revised 7 Sept 2026. Found a mistake? Tell us — corrections are the fastest thing we act on.

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