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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACTransformerEasy2 minPYQ_2020

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A step-down transformer is used on a $1000 V$ line to deliver $20 A$ at $120 V$ at the secondary coil. If the efficiency of the transformer is $80 %$ , the current drawn from the line is

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Solution:

$η % = \frac{80}{100} = \frac{V_{s} I_{s}}{V_{p} I_{p}} = \frac{120 \times 20}{1000 \times I_{p}}$

$I_{p} = \frac{120 \times 20}{1000 \times 0.8} = 3 A$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EMI/ACSubtopic:Transformer

⏱ 2mℹ️ Source: PYQ_2020

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