Single Stage Amplifier MCQ Quiz – Objective Question with Answer for Single Stage Amplifier MCQ

1. The input-output characteristic of an amplifier is

A. Linear function
B. Non-Linear function
C. Sinusoidal function with the change of phase
D. None of the mentioned

Answer: B

The input output characteristic of an amplifier is non linear function. It is given by y(t) = a0 + a1x(t) + a2x(t)^2…..

 

2. The amplifier works as a linear system for:

A. High-frequency signals
B. Low-frequency signals
C. Small signals
D. Large signals

Answer: C

The amplifier works as linear system for small signals and the output y(t) = a0+a1x(t).

 

3. In the MOSFET amplifier, the input is applied as:

A. Voltage across gate and source
B. Voltage across drain and source
C. Current at gate
D. Current at Drain

Answer: A

The input to the MOSFET amplifier is the gate to source voltage.

 

4. In the MOSFET amplifier, the parameter that changes due to the changes in input is:

A. Small signal drain current
B. Large signal drain current
C. Voltage across substrate and source
D. None of the mentioned

Answer: A

Due to the transconductance, drain current changes as input changes.

 

5. Input impedance of MOSFET amplifier in Common Source configuration is:

A. Very high at high frequencies
B. Very high at low frequencies
C. Very low at high frequencies
D. Very low at low frequencies

Answer: B

The input impedance of MOSFET amplifier in Common Source configuration is very high at low frequencies.

 

6. In the below input-output characteristic of the MOSFET amplifier, if Vin > Vin1, the MOSFET is said to operate in:

A. Saturation region
B. Cutoff region
C. Triode region
D. None of the mentioned

Answer: C

When Vin>Vin1, then the transistor is said to operate in the triode region.

 

7. The voltage gain of the MOSFET is given by:

A. Av = -βRd
B. Av = γRd
C. Av = -gmRd
D. None of the mentioned

Answer: C

The voltage gain is equal to the negative of the product of transconductance and resistance.

 

8. The MOSFET is said to be in a diode-connected configuration if:

A. A diode is placed between supply and drain
B. A diode is placed between source and ground
C. Source and gate are connected
D. Drain and gate are connected

Answer: D

A MOSFET is connected in such a way that both gate and drain are connected to supply, then it is said to be in Diode connected condition.

 

9. The diode-connected MOSFET acts as:

A. Active element for amplification
B. Voltage source
C. Current Source
D. Load Impedance

Answer: D

The diode-connected configuration of MOSFET acts as Load impedance.

 

10. In the below circuit, if the levels of input and output vary, the gain is found to:

A. Increase linearly as input level increases
B. Decrease linearly as output level decreases
C. Remain constant
D. Vary non linearly

Answer: C

The gain remains relatively constant for variations in the input and output levels.

Scroll to Top