Question

A primary winding of transformer has 500 turns whereas its secondary has 5000 turns. Primary is connected to ac supply of 20V, 50Hz The secondary output of.... 

(a) 200 V, 25 Hz 

(b) 200 V, 50 Hz 

(c) 2 V, 100 Hz 

(d) 2 V, 50 Hz

Answer 1

The correct option (b) 200 V, 50 Hz

Explanation:

N₁ = 500

N₂ = 5000

V₁ = 20V

For transformer, (V₁/V₂) = (N₁/N₂) hence

(20/V₂) = [(500)/(5000)]

(20/V₂) = (1/10)

V₂ = 200V

The frequency at secondary will be same as that at primary.

Hence V₂ = 200 V, 50Hz.