In a step-down transformer, 22 kV is converted into 220 V. The number of turns in the primary coil is 60000. The number of turns in the secondary coil will be
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 600
Given:
Primary voltage, $V_p = 22\ \text{kV} = 22000\ \text{V}$
Secondary voltage, $V_s = 220\ \text{V}$
Primary turns, $N_p = 60000$
Using the transformer relation:
$\frac{V_p}{V_s} = \frac{N_p}{N_s}$
$\frac{22000}{220} = \frac{60000}{N_s}$
$100 = \frac{60000}{N_s}$
$N_s = \frac{60000}{100} = 600$
Answer: $N_s = 600$ turns