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Question

A power transmission line feeds input power at 2300 V to a step down transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?

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Solution

Given: The input voltage to the transformer is 2300V
The number of turns in primary windings is 4000 turns
The output voltage of the transformer is 230 V

To find: The number of turns in the secondary coil.

The number of turns in the secondary coil is given by:
V1V2=n1n2

n1=4000; V2=230; V1=2300

n2=n1×V2V1n2=400×2302300400

So, turns in the secondary windings are 400.

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