# 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

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

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

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

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

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

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

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

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

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