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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACTransformerEasy2 minPYQ_2020

PhysicsEasysingle choice

A transformer of efficiency $90 %$ has turns ratio $10 : 1 .$ If the voltage across the primary is $220 V$ and current in the primary is $0.5 A,$ then the current in secondary is

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Answer:

Solution:

Given, $\frac{N_{P}}{N_{S}} = \frac{10}{1}$

$V_{P} = 220 V, I_{P} = 0.5 A$

We know that, $\frac{V_{P}}{V_{S}} = \frac{N_{P}}{N_{S}}$

Efficiency, $η = \frac{O u t p u t p o w e r}{I n p u t p o w e r} = \frac{I_{S} V_{S}}{I_{P} V_{P}}$

$\frac{90}{100} = \frac{I_{S}}{0.5}$ $\times \frac{1}{10}$

$\Rightarrow I_{S} = 4.5 A$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:EMI/ACSubtopic:Transformer

⏱ 2mℹ️ Source: PYQ_2020

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