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The voltage across the diode Vout if Vin is -5V and resistance is 10K is? (Use constant voltage drop model of diode and take VD as 0.5V)

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The voltage across the diode Vout if Vin is -5V and resistance is 10K is? (Use constant voltage drop model of diode and take VD as 0.5V)

(a) -3V

(b) 0V

(c) -5V

(d) -2.5V

This question was posed to me during an online exam.

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

1 Answer

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Correct answer is (c) -5V

To explain I would say: 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 diode is reverse biased entire voltage will appear across diode.

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