Question

A transformer has 1600 turns on its secondary and 200 turns on its primary. The primary is connected to a 20V ac source. What is the output voltage of the secondary in volts?

Answer 1

Given:

Number of turns on the primany of transformer = n₁ = 200 turns

Number of turns on the secondary of transformer = n₂ = 1600 turns

Primary voltage = V₁ = 20 V

To find: Secondary voltage = V₂= ?

We know that for an ideal transformer,

Voltage ratio = Turns ratio

(V₁ / V₂) = (n₁ / n₂)

_V2 = V₁ x (n₂  / n₁)

_V2 = 20 x [1600/200 ]

= 20 x 8

_V2 = 160 V

The output voltage of the secondary is 160 volts.

Since n₂ is greater then n₁ then V₂ is greater than V₁ and the device is termed a step-up transformer. When a load is connected