# CMOS Inverter MCQ Quiz – Objective Question with Answer for CMOS Inverter MCQ

1. CMOS inverter has ______ regions of operation.

A. three
B. four
C. two
D. five

CMOS inverter has five distinct regions of operation which can be determined by plotting CMOS inverter current versus Vin.

2. If the n-transistor conducts and has a large voltage between source and drain, then it is said to be in _____ region.

A. linear
B. saturation
C. non-saturation
D. cut-off

If the n-transistor conducts and has a large voltage between source and drain, then it is in saturation.

3. If the p-transistor is conducting and has a small voltage between source and drain, then it is said to work in ________

A. linear region
B. saturation region
C. non-saturation resistive region
D. cut-off region

If the p-transistor is conducting and has a small voltage between source and drain, then it is said to be in the unsaturated resistive region.

4. In the region where inverter exhibits gain, the two transistors are in the _______ region.

A. linear
B. cut-off
C. non-saturation
D. saturation

In the region where the inverter exhibits gain, the two transistors n and p operate in the saturation region.

5. If both the transistors are in saturation, then they act as ________

A. current source
B. voltage source
C. divider
D. buffer

When both the transistors are in saturation, they act as current sources so that the equivalent circuit is two current sources between Vdd and Vss.

6. If βn = βp, then Vin is equal to ________

A. Vdd
B. Vss
C. 2Vdd
D. 0.5Vdd

If βn = βp, then Vin = 0.5Vdd which implies that the changeover between logic levels is symmetrically disposed about the point.

7. Mobility depends on ________

A. Transverse electric field
B. Vg
C. Vdd
D. Channel length

Mobility is affected by the transverse electric field and thus also depends on Vgs and the mobility of p-device and n-device are inherently unequal.

8. In a CMOS inverter, the transistor is a switch having ________

A. infinite on resistance
B. finite off resistance
C. buffer
D. infinite off resistance

In a CMOS inverter, the transistor is a switch having finite on resistance and infinite off resistance.

9. CMOS inverter has ______ output impedance.

A. low
B. high
C. very high
D. none of the mentioned

CMOS inverter has low output impedance and this makes it less prone to noise and disturbance.

10. What is the input resistance of the CMOS inverter?

A. high
B. low
C. very low
D. none of the mentioned