Question

A. Draw a labeled diagram of a step-up transformer. Obtain the ratio of secondary to primary voltage in terms of number of turns and currents in the two coils.

B. A power transmission line feeds input power at 2200 V to a step-down transformer with its primary windings having 3000 turns. Find the number of turns in the secondary to get the power output at 220 V.

Answer 1

Answer:

this is for A ... IDK about B sorry

Answer 2

The number of turns in the secondary to get the power output at 220 V is 300

Let us consider the primary voltage to be V,which is 2200V.

The primary windings has turns, N = 3000

Also, the output voltage V' = 220V

And, the turns in secondary is N'.

We know that,

N/N' = V/V'

Substituting the values, we get

3000/N' = 2200/220

⇒ 3000/N' = 10

⇒ N' = 3000/10 = 300

So, 300 turns is the answer.