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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical PowerMedium2 minPYQ_2013

PhysicsMediumsingle choice

The internal resistance of a primary cell is $4Ω$ . It generates a current of 0.2 A in an external resistance of $21Ω$ . The rate at which chemical energy to consumed in providing current is

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Answer:

Solution:

Rate of energy $\frac{H}{t} = i^{2} R$ (But total Resistance $R = 21 + 4 = 25Ω$ ) So, $\frac{H}{t} = 0.2 \times 0.2 \times 25 = 1 J / s$

Stream:JIPMERSubject:PhysicsTopic:Current ElectricitySubtopic:Electrical Power

⏱ 2mℹ️ Source: PYQ_2013

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