Question

In a transformer the transformation ratio is 0.3. If 220 V ac is fed to the primary, then the voltage across the secondary will be

• A. 44 V
• B. 55 V
• C. 60 V
• D. 66 V

Answer 1

Answer: (D)

66 V

Here, transformation ratio, k = 0.3

As, $k=\frac{N_s}{N_p}=\frac{V_s}{V_p}$

$\therefore V_s=k{V}_p$

$\Rightarrow 0.3\times 220=66V.$