First slide

Rectifiers

Question

The applied a.c power to a half-wave rectifier is $200 W$ . The d.c power output obtained is $50 W$ . The rectification efficiency is

Easy

A

$12.5 %$
B

$25 %$
C

$37.5 %$
D

$50 %$

Solution

Efficiency $η = \frac{P_{o u t}}{P_{i n}} \times 100$
$= \frac{50}{200} \times 100$

$∴ η = 25 %$

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