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?

Answer 1

Given: The input voltage to the transformer is $2300V$

The number of turns in primary windings is $4000turns$

The output voltage of the transformer is $230V$

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

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

$\frac{V_1}{V_2}=\frac{n_1}{n_2}$

$n_1=4000;V_2=230;V_1=2300$

$n_2=\frac{n_1\times V_2}{V_1}\Rightarrow n_2=\frac{400\times 230}{2300}\Rightarrow 400$

So, turns in the secondary windings are $400$.