First slide

Rectifiers

Question

The percentage of efficiency for full wave rectifier

Moderate

A

40.6%
B

48.2%
C

81.2%
D

121%

Solution

$E f f i c i e n c y o f F u l l W a v e R e c t i f i e r : η = \frac{d c p o w e r o u t p u t}{a c p o w e r i n p u t} = \frac{0.812 R_{L}}{R_{F} + R_{L}}$
$h e r e R_{F} = d i o d e f o r w a r d r e s i s \tan c e R_{L} = l o a d r e s i s \tan c e$
$T h e p e r c e n t a g e o f m a x i m u m e f f i c i e n c y f o r f u l l w a v e r e c t i f i e r i s 81.2 %$

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