Question

The number of turns between different pairs of output terminals are shown for a step-up transformer.

Input voltage of 20 V is applied between A and B. Between which two terminals will the output be 120 V?

पर्याय

• P and Q

• Q and S

• P and R

• P and S

Answer 1

P and S

Explanation:

Given: V_P = 20 V

N_P = 20 turns

V_S = 120 V

Using the transformer equation,

`V_S/V_P = N_S/N_P`

`120/20 = N_S/20`

N_S = `(120 xx 20)/20`

= 120 turns

We know that,

P to Q = 20 turns

Q to R = 20 turns

R to S = 60 turns

So, total turns are 120. Hence, the terminals between which the voltage will be 120 V are P and S.