Question

Efficiency of a half-wave rectifier is nearly:

• A. $80\%$
• B. $60\%$
• C. $40\%$
• D. $20\%$

Answer 1

Answer: (C)

We know that the efficiency of half wave rectifier is equal to
$\frac{4}{{\pi }^2}=\frac{4}{(3.14{)}^2}=0.40=40\%$