Question

The number of turns in primary coil of a transformer is 20 and the number of turns in the secondary is 10. If the voltage across the primary is 220 V, what is the voltage across the secondary?

• A. 110 V
• B. 130 V
• C. 190 V
• D. 310 V

Hint:

The number of turns in primary coil of a transformer is 20 and the number of turns in the secondary is 10. If the voltage across the primary is 220 V, what is the voltage across the secondary?

Answer 1

The Correct Option is A

Step 1: Formula
The transformer ratio is $\frac{e_{S}}{e_{P}} = \frac{N_{S}}{N_{P}}$.
Step 2: Values
$N_{P} = 20, N_{S} = 10, e_{P} = 220 \text{ V}$.
Step 3: Calculation
$e_{S} = \frac{10}{20} \times 220 = 110 \text{ V}$.
Hence, the Answer is: (a)