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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2020

PhysicsEasysingle choice

The ratio of the resistance of conductor at temperature $15 ° C$ to its resistance at temperature $37.5 ° C$ is $4 : 5$ . The temperature coefficient of resistance of the conductor is -

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Answer:

Solution:

$R_{T} = R_{0} (1 + α T)$

$\frac{R_{15}}{R_{37.5}} = \frac{R_{0} (1 + α \times 15)}{R_{0} (1 + α \times 37.5)} ∴ \frac{4}{5} = \frac{1 + α \times 15}{1 + α \times 37.5}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2020

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