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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACTransformerEasy2 minPYQ_2010

PhysicsEasysingle choice

A $220 V$ input is supplied to a transformer. The output circuit draws a current of $2.0 A$ at $440 V$ . If the efficiency of the transformer is $80%$ , the current drawn by the primary windings of the transformer isNEET 2010 (Screening)

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Solution:

Efficiency is defined as the ratio of output power and input power $ie, η % 80 \Rightarrow i_{p} = \frac{P _{out}}{P _{in}} \times 100 = \frac{V _{s} i _{s}}{V _{p} i _{p}} \times 100 = \frac{2 \times 440}{220 \times i _{p}} \times 100 = 5 A$

Stream:NEETSubject:PhysicsTopic:EMI/ACSubtopic:Transformer

⏱ 2mℹ️ Source: PYQ_2010

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