If each diode in the figure has a forward

Question:

If each diode in the figure has a forward bias resistance of 25Ω and infinite resistance in reverse bias, what will be the values of the current I1, I2, I3 and I4?

Solution:

Forward bias resistance = 25 ohms

Reverse biased resistance = infinity

I3 = 0

Resistance in AB = 150 ohms

Resistance in EF = 150 ohms

AB is parallel to EF

Effective resistance, R’ = 75 ohm

Resistance R of the circuit = R’ = 100 ohms

Current = 0.05 A

I2 = 0.025 A

I4 = 0.025 A

Therefore,

I1 = 0.05 A

I2 = 0.025 A

I3 = 0

I4 = 0.025 A

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