Previous Year Questions

Q1 MCQ GATE EC Medium 1 Mark 2026

ANALOG CIRCUITS → BJT ANALYSIS

Consider the circuit shown in the Figure with $V_{i}=3$ V and $V_{CC}=12~V$.

Assume $V_{BE}=0.7~V$ and $\beta_{dc}=99$ for the BJT.

Which of the following options is the correct value of the current $I_{o}$?

Choose One:

A) $60~\mu A$

B) $6~\mu A$

C) $3~\mu A$

D) $30~\mu A$

Q2 MCQ GATE EC Hard 2 Marks 2026

ANALOG CIRCUITS → BJT ANALYSIS

A small signal source, $V_{i}(t)=A\cos(10^{5}t)+B\sin(10^{7}t)$ is applied to a BJT circuit as shown in the Figure.

Assume zero source resistance, $V_{BE}=0.7~V$, $\beta_{dc}=99$, Early voltage $=100~V$ and Thermal voltage $=25~mV$. Effect of internal parasitic capacitances of the BJT may be neglected.

Which expression is the best approximation of the output voltage $V_{o}(t)$?

Choose One:

A) $-9.1[A\cos(10^{5}t)+B\sin(10^{7}t)]$

B) $9.1[A\cos(10^{5}t)-B\sin(10^{7}t)]$

C) $-190.4[A\cos(10^{5}t)+B\sin(10^{7}t)]$

D) $190.4[A\cos(10^{5}t)-B\sin(10^{7}t)]$

Q3 MSQ GATE EC Medium 1 Mark 2026

ANALOG CIRCUITS → BJT ANALYSIS

Figure shows the output characteristics of two different Bipolar Junction Transistors (BJT), BJT 1 with magnitude of Early voltage $|V_{A1}|$ and BJT 2 with magnitude of Early voltage $|V_{A2}|$.

Which of the following options is/are correct regarding the Early voltages?

Choose All Applicable:

A) $|V_{A1}|>|V_{A2}|$

B) $|V_{A1}|$ is infinitely large

C) $|V_{A1}|<|V_{A2}|$

D) $|V_{A2}|$ is finite

Q4 NAT GATE EC Medium 2 Marks 2026

ANALOG CIRCUITS → DIODE APPLICATIONS

Consider the ideal diodes D1 and D2 as shown in the Figure with cut-in voltage $V_{\gamma}=0$ Volt and $v_{i}(t)$ is in Volt.

The maximum voltage (Volt) of the output $v_{o}(t)$ is ___

(rounded off to two decimal places)

Given: $v_i(t) = 6\sin(\omega t)$ with biasing sources 2 V and 4 V on D1 and D2 branches respectively.

Enter Numerical Answer:

Q5 NAT GATE EC Medium 2 Marks 2026

ANALOG CIRCUITS → FET AND MOSFET ANALYSIS

An n-channel MOSFET is connected as shown in the Figure.

Assume $V_{TH}=1$ V, $V_{DD}=5$ V, and $\mu C_{ox}(W/L)=2\text{ mA V}^{-2}$ and neglect channel length modulation effects.

The gate voltage $(V_{G})$ of the n-channel MOSFET (in Volt) is ___.

(rounded off to two decimal places)

PYQBOOK

Filter Questions

Consider the circuit shown in the Figure with $V_{i}=3$ V and $V_{CC}=12~V$.

Assume $V_{BE}=0.7~V$ and $\beta_{dc}=99$ for the BJT.

Which of the following options is the correct value of the current $I_{o}$?

Choose One:

Choose One:

Figure shows the output characteristics of two different Bipolar Junction Transistors (BJT), BJT 1 with magnitude of Early voltage $|V_{A1}|$ and BJT 2 with magnitude of Early voltage $|V_{A2}|$.

Which of the following options is/are correct regarding the Early voltages?

Choose All Applicable:

Enter Numerical Answer:

An n-channel MOSFET is connected as shown in the Figure.

Assume $V_{TH}=1$ V, $V_{DD}=5$ V, and $\mu C_{ox}(W/L)=2\text{ mA V}^{-2}$ and neglect channel length modulation effects.

The gate voltage $(V_{G})$ of the n-channel MOSFET (in Volt) is ___.

(rounded off to two decimal places)

Enter Numerical Answer:

PYQBOOK

Filter Questions

Consider the circuit shown in the Figure with $V_{i}=3$ V and $V_{CC}=12~V$.Assume $V_{BE}=0.7~V$ and $\beta_{dc}=99$ for the BJT.Which of the following options is the correct value of the current $I_{o}$?

Choose One:

Choose One:

Figure shows the output characteristics of two different Bipolar Junction Transistors (BJT), BJT 1 with magnitude of Early voltage $|V_{A1}|$ and BJT 2 with magnitude of Early voltage $|V_{A2}|$.Which of the following options is/are correct regarding the Early voltages?

Choose All Applicable:

Enter Numerical Answer:

An n-channel MOSFET is connected as shown in the Figure.Assume $V_{TH}=1$ V, $V_{DD}=5$ V, and $\mu C_{ox}(W/L)=2\text{ mA V}^{-2}$ and neglect channel length modulation effects.The gate voltage $(V_{G})$ of the n-channel MOSFET (in Volt) is ___.(rounded off to two decimal places)

Enter Numerical Answer:

Consider the circuit shown in the Figure with $V_{i}=3$ V and $V_{CC}=12~V$.

Assume $V_{BE}=0.7~V$ and $\beta_{dc}=99$ for the BJT.

Which of the following options is the correct value of the current $I_{o}$?

Figure shows the output characteristics of two different Bipolar Junction Transistors (BJT), BJT 1 with magnitude of Early voltage $|V_{A1}|$ and BJT 2 with magnitude of Early voltage $|V_{A2}|$.

Which of the following options is/are correct regarding the Early voltages?

An n-channel MOSFET is connected as shown in the Figure.

Assume $V_{TH}=1$ V, $V_{DD}=5$ V, and $\mu C_{ox}(W/L)=2\text{ mA V}^{-2}$ and neglect channel length modulation effects.

The gate voltage $(V_{G})$ of the n-channel MOSFET (in Volt) is ___.

(rounded off to two decimal places)