Question

In a half wave rectifier, a p-n junction diode with internal resistance 20 ohm is used. If the load resistance of 2 ohm is used in the circuit, then find the efficiency of this half wave rectifier.

Answer 1

Internal resistance `( r_(f)) = 20 Omega `
`R_(L) = 2k Omega = 2000 Omega `
`eta = ( 0.406R_(L))/(r_(f) + R_(L)) = ( 0.406 xx 2000)/( 20+ 2000) xx 100 = ( 812 xx 100)/( 2020)`
`eta = 40.2 %`