Question

In a full wave rectifier output is taken across a load resistor of `800 ohm`. If the resistance of diode in forward biased condition is `200 ohm`, the efficiency of rectification of `ac` power into `dc` power is.
A. `64.96%`
B. `40.6 %`
C. `81.2 %`
D. `80%`

Answer 1

Correct Answer - A
`eta=0.812xx(R_(l))/(R_(l)+r_(f))=(0.812xx800)/(800+200)`
`=64.96%`