Question

Learning Goal: To understand the concepts explaining the operation of transformers.

Answer 1

Answer:

Part a)

ZERO

Part b)

N = 10 turns

Explanation:

Part a)

As we know that transformer is used to change the input voltage into required output voltage

Here this input and output is considered only when it will change with time as the whole concept is based upon Faraday's law where we need to change the flux with time.

So if we have input Source is DC source then output voltage will be zero as there is no flux change

Part b)

As we know by the principle of transformer

$\frac{V_1}{V_2} = \frac{N_1}{N_2}$

$\frac{500}{25} = \frac{200}{N_2}$

$N_2 = 10$

so total number of turns in secondary coil must be 10