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The current I through the circuit if we consider diode in constant voltage drop model is? (Take VD as 0.5V)

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The current I through the circuit if we consider diode in constant voltage drop model is? (Take VD as 0.5V)

(a) 2mA

(b) 2.5mA

(c) 3.5mA

(d) 1mA

I have been asked this question by my school principal while I was bunking the class.

My doubt is from Constant Voltage Drop Model-1 topic in chapter Diode Circuit of Analog Circuits

1 Answer

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Best answer
The correct option is (b) 2.5mA

Best explanation: In constant voltage drop model at forward bias diode can be replaced as a cell and in reverse bias diode can be avoided by considering the terminals are open.

Since D1 is in forward biased there will be a voltage drop of 0.5V. So net voltage will be 2.5V and hence current is 2.5mA.

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