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A full wave p-n junction diode rectifier uses a load resistance of 1300ohm. The internal resistance of each diode is 9 ohm. Find the efficiency of this full wave rectifier.

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Given that `R_(L) = 1300 Omega `
`r_(f) = 9 Omega `
` eta = ( 0.812 R_(L))/( r_(f) + R_(L)) = ( 0.812 xx 1300)/( 9+ 1300) xx 100`
`eta = ( 8120 xx 13)/( 1309) `
` eta = 80.64 %`

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