Question

The primary winding of a transformer has 500 turns where as its secondary has 5000 turns. The primary is connected to an a.c. supply of 20V, 50 Hz. The secondary will have an output of

• A. 2 V, 5 Hz
• B. 20 V, 5 Hz
• C. 200 V, 50 Hz
• D. 20 V, 500 Hz

Answer 1

The correct option is C 200 V, 50 Hz

Given,The number of turns in primary winding is $N_p=500$

The number of turns in secondary winding is $N_s=5000$

The voltage of primary coil is $V_p=20V$

Let the voltage of secondary coil be $V_s$

We have,

$\frac{N_s}{N_p}=\frac{V_s}{V_p}$

$\frac{20}{V_s}=\frac{500}{5000}$

$\Rightarrow V_s=200V$

Frequency remains the same, Therefore secondary winding will have an output of $200V$and $50Hz$

Therefore option $C$ is correct