Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityElectrical PowerMedium2 minPYQ_2020

PhysicsMediumsingle choice

An electrical power line, having a total resistance of $2 Ω,$ delivers $1 kW$ at $220 V$ . The efficiency of the transmission line is approximately :

Answer:

Solution:

$i = \frac{P}{V} = \frac{1000}{220}$

$P_{R} = (i^{2}) R$

$η = \frac{1000 \times 100}{1000 + 41.32} = 96 %$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Electrical Power

⏱ 2mℹ️ Source: PYQ_2020

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