Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12

# A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 300 turns. Find the number of turns in the secondary to get the power output at 220 V. - Physics

A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 300 turns. Find the number of turns in the secondary to get the power output at 220 V.

#### Solution

ns= ?

np= 3000

Ep= 2200 V

ES= 220 V

Since,
E_s/E_p= n_s/n_p

220/2200= n_s/3000

n_s = 300

Concept: Transformers
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