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Transformer

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Question

A power transmission line feeds power at 2200 v with a current of 5 A to a step down transformer with its primary winding having 4000 turns calculate the number of turns and the current in the secondary in order to get output power at 220v

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Solution

V1 = 2200v
V2 = 220v
N1= 4000 turns
N2=?
Current I1=5A
Current I2=?

V1/V2 = N1/N2 = I2/I1

2200/220=4000/N2

N2= 400 turns

V1/V2 = I2/I1

2200/220 = I2/5

I2= 50A

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