Question

The primary winding of transformer has $500$ turns whereas its secondary has $5000$ turns. The primary is connected to an A.C supply of $20V,50Hz$. The secondary will have an output of

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

Answer 1

The correct option is D $200V,50Hz$

$\text{The transformer converts A.C high voltage into A.C low voltage,}$ $\text{but it does not cause any change in frequency}$

$\frac{E_s}{E_p}=\frac{N_s}{N_p}\Rightarrow E_s=\frac{N_s}{N_p}{E}_p=\frac{5000}{500}\times 20$

$\text{Thus output has voltage}200\text{V and frequency 50 Hz}$.