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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismProperties of magnetEasy2 minPYQ_2007

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The temperature coefficient of resistance of a wire is $0.00125/ K$ . At $300 K$ its resistance is $1Ω$ . The resistance of the wire will be $2Ω$ at

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Solution:

Temperature coefficient, $α = \frac{R _{2} - R _{1}}{R _{1} ( t _{2} - t _{1} )}$ $\Rightarrow (t_{2} - t_{1}) = \frac{R _{2} - R _{1}}{α R _{1}}$ $\Rightarrow t_{2} - t_{1} = \frac{2 - 1}{1 \times 0.00125}$ $t_{2} = \frac{1}{0.00125} + t_{1} = 800 + 300 = 1100 K$

Stream:VITEEESubject:PhysicsTopic:MagnetismSubtopic:Properties of magnet

⏱ 2mℹ️ Source: PYQ_2007

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