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Physics-

General

Easy

Question

In transformer, core is made of soft iron to reduce

Hysteresis losses
Eddy current losses
Force opposing electric current
None of the above

The correct answer is: Hysteresis losses

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A loss free transformer has 500 turns on its primary winding and 2500 in secondary. The meters of the secondary indicate $200 blank v o l t s$ at $8 blank a m p e r e s$ under these conditions. The voltage and current in the primary is

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The primary winding of transformer has 500 turns whereas its secondary has 5000 turns. The primary is connected to an ac supply of $20 blank V comma blank 50 blank H z$ . The secondary will have an output of

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According to Faraday’s law of electromagnetic induction

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Let $R$ be an equivalence relation on a finite set $A$ having $n$ elements. Then, the number of ordered pairs in $R$ is

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