Assertion (A) : The gate of a MOSFET is insulated from body of FET by deposition of a very thin fragile layer of $\text{SiO}_2$ over the substrate.
Reason (R) : The device is therefore called an insulated gate field-effect transistor (IGFET).
In the light of the above statements, choose the most appropriate answer from the options given below :
In this question, we are given two statements: an Assertion (A) and a Reason (R). Our goal is to determine the relationship between them and select the most appropriate answer.
Assertion (A): The gate of a MOSFET is insulated from the body of FET by deposition of a very thin fragile layer of \(\text{SiO}_2\) over the substrate.
Reason (R): The device is therefore called an insulated gate field-effect transistor (IGFET).
Explanation:
- The term "MOSFET" stands for Metal-Oxide-Semiconductor Field-Effect Transistor. The gate of a MOSFET is insulated from the rest of the device by a thin oxide layer, typically silicon dioxide (\(\text{SiO}_2\)), which serves as an insulator. This is exactly what the Assertion (A) states—indicating the insulating nature of the oxide layer.
- Due to this insulating property of the gate achieved through the deposition of \(\text{SiO}_2\), the MOSFET is also known as an Insulated Gate FET (IGFET). This is because the gate does not make direct contact with the conductive channel; instead, it is separated by an insulating oxide layer, which Reason (R) describes.
- Both Assertion (A) and Reason (R) are correct. Furthermore, Reason (R) correctly explains the Assertion (A) because the terminology of "insulated gate" directly arises from the structural characteristic described in the Assertion.
Conclusion:
Thus, the correct answer is: Both (A) and (R) are correct and (R) is the correct explanation of (A).
Similar Questions
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Assertion (A) : The body effect in MOSFET causes the threshold voltage $V_{\text{th}}$ to increase as source-body voltage $V_{\text{SB}}$ increases.
Reason (R) : Increasing $V_{\text{SB}}$ raises the surface potential and therefore reduces the barrier for inversion.
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C. CMRR
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Choose the correct answer from the options given below : - Which of the following statements are correct:
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Choose the correct answer from the options given below :
Important Questions from Miscellaneous
- Which of the following scheduler/schedulers is/are also called CPU scheduler ?
(A). Short Term Scheduler
(B). Long Term Scheduler
(C). Medium Term Scheduler
(D). Asymmetric Scheduler
Choose the correct answer from the options given below: - A situation where two or more processes are blocked, waiting for resources held by each other is called:
- External fragmentation occurs ________.
- Which disk scheduling algorithm looks for the track closest to the current head position?
- Which CPU scheduling algorithm prefers the process with the shortest burst time?
