Question

The primary winding of a transformer has 500 turns and its secondary has 5000 turns. If primary is connected to a.c. supply of 20 V and  50 Hz, then secondary will have an output of

(a) 200 V, 50 Hz

(b) 2 V, 5 Hz

(c) 2 V, 50 Hz

(d) 200 V, 500 Hz.

Answer 1

Correct option (a) 200 V, 50 Hz

Explanation

Given : Number of tums in the primary N₁ = 500

Number of tums in the secondary N₂ = 5000 Input voltage V₁ = 20 V, Output voltage V₂ = ?

As in a transformer the output frequency of the ac supply remains the same as that of the input supply, the frequency of the output current will be 50 Hz.