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 is:

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

Answer 1

Answer: (D)

66 V

Answer 2

: Here, Transformation ratio, $k = 0.3$As, $k = \frac{N_{s}}{N_{p}} = \frac{V_{s}}{V_{p}}$

$\therefore V_{s} = kV_{P} = 0.3 \times 220 = 66V.$