Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityCurrent & ResistanceMedium2 minPYQ_2025

PhysicsMediumsingle choice

A motor operating on 100 V draws a current of 1 A. If the efficiency of the motor is $91.6%$ , then the loss of power in units of $cal / s$ is

Answer:

Solution:

$P_{input} = Vi = 100 W η = \frac{P _{out}}{P _{input}} = 0.916$
$P_{out} = 91.6 W Loss = 100 - 91.6 = 8.4 J / s = 2 cal / s$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Current & Resistance

⏱ 2mℹ️ Source: PYQ_2025

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