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If each diode in figure has a forward ha...

If each diode in figure has a forward has a forward bias resistance of 25 Omega and infinite resistance in reverse bias, what will be the values of the current ` I_1 , I_2 , I_3 and I_4? `

Text Solution

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In circuit the p-n junction diode of arm AB and EF are forward biased and p-n junction of arm CD is reverse biased. Hence resistance of arm CD is infinity.
Effective resistance of circuit,
`R_(eff)=25+((25+125)(25+125))/((25+125)+(25+125))`
`=25+75=100Omega`
`:. Current I_(1)=5/100=0.05A, Current I_(3)=5/oo=0`,
Current `I_(2)=5/100xx150/300=0.025A=current I_(4)`
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