MOSFET Questions

MOSFETs or Metal Oxide Silicon Field Effect Transistor is a four-terminal device that features source (S), gate (G), drain (D) and body (B) terminals. MOSFET was designed to overcome slow operation, moderate input impedance, and high drain resistance of FETs.

Operating regions of MOSFET include the following:

• Cut-Off Region
• Ohmic Region
• Saturation Region

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Important MOSFET Questions with Answers

1. State true or false: Cosmic rays affect transistors.

1. TRUE
2. FALSE

Answer: a) TRUE

Explanation: Transistors are affected by cosmic rays and radiation.

2. What are the two types of transistors?

Two types of transistors are:

• Bipolar Junction Transistor (BJT)
• Field Effect Transistor (FET)

3. MOSFET features how many terminals?

1. 2
2. 3
3. 4
4. 5

Answer: c) 4

Explanation: MOSFET features four terminals, they are: source (S), gate (G), drain (D), and body (B).

4. Choose YES or NO: Can MOSFET be fabricated on a single chip?

1. YES
2. No

Answer: a) YES

Explanation: Due to the compact size of MOSFET, it can be fabricated on a single chip.

5. What are the two types of Bipolar Junction Transistor (BJT)?

Two types of Bipolar Junction Transistor (BJT) are:

1. PNP transistor
2. NPN transistor

6. Transistors are employed in

1. Digital circuits
2. Analog circuits
3. Both Digital and Analog circuits
4. None of the above options

Answer: c) Both Digital and Analog circuits.

Explanation: Transistors are employed in both analog and digital circuits.

7. Basic forms for MOSFET are _____

1. Depletion Type
2. Enhancement Type
3. BJT type
4. Option (a) and (b)

Answer: d) Option (a) and (b)

Explanation: MOSFETs are available in two basic forms: depletion type and enhancement type.

8. Depletion mode is classified into _____

1. P-channel
2. N-channel
3. R-channel
4. P-channel and N-channel

Answer: d) P-channel and N-channel

Explanation: Depletion mode is classified as N-channel or P-channel.

9. Choose the correct answer: The input resistance of BJT is _____

1. High
2. Low

Answer: b) Low

Explanation: The input resistance of BJT is low, and the input resistance of MOSFET is high.

10. MOSFET is designed to overcome _____

1. Slow operation
2. Moderate input impedance
3. High drain resistance
4. All the above options

Answer: d) All the above options.

Explanation: MOSFET is designed to overcome slow operation, moderate input impedance, and high drain resistance.

Practice Questions

1. Who invented the bipolar junction transistor?
2. What are the types of field-effect transistors?
3. Define Metal Oxide Semiconductor Field Effect Transistor.
4. List the advantages and disadvantages of MOSFET.
5. Explain the enhancement mode in MOSFET.

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