Question

A stepdown transformer converts 2200 volt transmission line voltage to 220 volts. Number of turns in secondary coil are 500. Evaluate the no. of turns in primary coil

Answer 1

Given, input power (Vp )  = 2200V

Number of turns (n1)  = 3000

Output power (Vs)   = 220 V

⇒ 300

∴ Number of turns in the secondary winding, n2 = 300 turns.

Answer 2

Given :

A step down transformer converts 2200 volt transmission line voltage to 220 volts.

Number of turns in secondary coil are 500.

To Find :

The number of turns in primary coil .

Solution :

We know , in a transformer .

$\dfrac{V_s}{V_p}=\dfrac{n_s}{n_p}$

Putting all given values we get :

$\dfrac{500}{n_p}=\dfrac{220}{2200}\\\\n_p=\dfrac{500\times 2200}{220}\\\\n_p=5000$

Therefore , number of turns in primary coil are 5000 .

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Transformer

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