# Electronic Devices · Physics · WB JEE

Start Practice## MCQ (Single Correct Answer)

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 reverse bias is applied across the d...

WB JEE 2008

The binary number 10111 is equivalent to the decimal number

WB JEE 2023

In the given circuit, find the voltage drop $$\mathrm{V_L}$$ in the load resistance $$\mathrm{R_L}$$....

WB JEE 2023

Consider the logic circuit with inputs A, B, C and output Y. How many combinations of A, B and C gives the output Y = 0 ?...

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 minimum current required to pass th...

WB JEE 2022

The expression $$\overline A (A + B) + (B + AA)(A + \overline B )$$ simplifies to

WB JEE 2021

What is the value of current through the diode in the circuit given?...

WB JEE 2021

For the given logic circuit, the output Y for inputs (A = 0, B = 1) and (A = 0, B = 0) respectively are...

WB JEE 2020

A common emitter transistor amplifier is connected with a load resistance of 6 k$$\Omega $$
. When a small AC signal of 15 mV is added to the base-emi...

WB JEE 2020

In the circuit shown, the value of $$\beta $$ of the transistor is 48. If the supplied base current is 200 $$\mu $$A, what is the voltage at the termi...

WB JEE 2019

In the circuit shown, what will be the current through the 6V zener?...

WB JEE 2019

Each of the two inputs A and B can assume values either 0 or 1. Then which of the following will be equal to $$\overline {A\,} $$ . $$\overline {B\,} ...

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 outputs X and Y?...

WB JEE 2018

What will be the current flowing through the 6k$$\Omega $$ resistor in the circuit shown, where the breakdown voltage of the Zener is 6V?...

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 outputs at Y in these two cases ...

WB JEE 2017

When a semiconducting device is connected in series with a battery and a resistance, a current is found to flow in the circuit. If however, the polari...