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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACTransformerEasy2 minPYQ_2020

PhysicsEasysingle choice

A transformer having an efficiency of $90 %$ is working on $200 V$ , $3 kW$ power supply. If the current in the secondary coil is $6 A$ , then the voltage across the secondary coil and the current in the primary coil respectively, are

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Answer:

Solution:

Power output $= 3 kW \times \frac{90}{100} = 2.7 kW$

$I_{s} = 6 A$

$∴ V_{s} = \frac{2.7 kW}{6 A} = 450 V$

$\Rightarrow I_{p} = \frac{3 kW}{200 V} = 15 A$

Subject:PhysicsTopic:EMI/ACSubtopic:Transformer

⏱ 2mℹ️ Source: PYQ_2020

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