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Physics - EMI/AC Question with Solution | TestHub

PhysicsEMI/ACTransformerEasy2 minPYQ_2020

PhysicsEasysingle choice

In a transformer the number of primary turns is four times that of the secondary turns. Its primary is connected to an AC source of voltage $V .$ Then

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Answer:

Solution:

In a transformer the primary and secondary currents are related by

$I_{s} = (\frac{N_{p}}{N_{s}}) I_{p}$

And the voltage are related by

$V_{s} = (\frac{N_{s}}{N_{p}}) V_{p}$

Where subscripts p and s refer to the primary and secondary of the transformer.

Here, $V_{p} = V, \frac{N_{p}}{N_{s}} = 4$

$∴ I_{s} = 4 I_{p}$

And $V_{s} = (\frac{1}{4}) V = \frac{V}{4}$

Subject:PhysicsTopic:EMI/ACSubtopic:Transformer

⏱ 2mℹ️ Source: PYQ_2020

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