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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACTransformerEasy2 minQB

PhysicsEasysingle choice

A power transmission line feeds input power at $2300 V$ to a step-down transformer with its primary windings having $4000$ turns giving the output power at $230 V$ . If the current in the primary coil of the transformer is $5 A$ and its efficiency is $90%$ , the output current would be:

Options:

Answer:

Solution:

Efficiency, $η = 0.9 = \frac{P _{s}}{P _{p}}$

$V_{s} I_{s} = 0.9 \times V_{p} I_{p}$

$I_{s} = \frac{0.9 \times 2300 \times 5}{230} = 45 A$

Stream:JEESubject:PhysicsTopic:EMI/ACSubtopic:Transformer

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