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
In an ideal transformer the voltage per turn is the same in both coils, so the voltages are in the ratio of the numbers of turns.
\( \displaystyle \frac{V_s}{V_p} = \frac{N_s}{N_p} \;\Rightarrow\; N_s = N_p\,\frac{V_s}{V_p} \)
\( V_p = 22\,\mathrm{kV} = 22000\,\mathrm{V} \)
\( V_s = 220\,\mathrm{V} \)
\( \displaystyle N_s = 60000 \times \frac{220}{22000} = 600 \)
Note: The same question was also asked in CUET (UG) 2025 on 23-05-2025 (Slot 2).