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Previous Years Questions

MCQ (Single Correct Answer)

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The expression $$\overline A (A + B) + (B + AA)(A + \overline B )$$ simplifies to
WB JEE 2022
A Zener diode having break down voltage Vz = 6V is used in a voltage regulator circuit as shown in the figure. The minim...
WB JEE 2022
For the given logic circuit, the output Y for inputs (A = 0, B = 1) and (A = 0, B = 0) respectively are...
WB JEE 2021
What is the value of current through the diode in the circuit given?...
WB JEE 2021
In the circuit shown, the value of $$\beta $$ of the transistor is 48. If the supplied base current is 200 $$\mu $$A, wh...
WB JEE 2020
Each of the two inputs A and B can assume values either 0 or 1. Then which of the following will be equal to $$\overline...
WB JEE 2019
In the circuit shown, what will be the current through the 6V zener?...
WB JEE 2019
What will be the current flowing through the 6k$$\Omega $$ resistor in the circuit shown, where the breakdown voltage of...
WB JEE 2018
In the circuit shown, inputs A and B are in states 1 and 0 respectively. What is the only possible stable state of the o...
WB JEE 2018
When a semiconducting device is connected in series with a battery and a resistance, a current is found to flow in the c...
WB JEE 2017
In the given circuit, the binary inputs at A and B are both 1 in one case and both 0 in the next case. The respective ou...
WB JEE 2017
The binary number 10111 is equivalent to the decimal number
WB JEE 2008
A Si and a Ge diode has identical physical dimensions. The band gap in Si is larger than that in Ge. An identical revers...
WB JEE 2008

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