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Determine the current through the resist...

Determine the current through the resistor for following circuits

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Case (a) All the diods are in forward bias and offer no resistance
Current in circuit `I=5/25=0.2 A`
Case (b) =No current will flow through diode `D_(1)` and `D_(2)` as they are reverse biased
`:. ` Current in the remaining circuit is `I=5/25=0.2A`
Case (c) : All the diode are reverse biased so no current will flow in circuit
`:. I=0`
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