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Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.
Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.
Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Assertion (A) : A Schottky diode has very high reverse voltage rating ...
A Schottky diode has very low reverse voltage rating as compared to alloyed and diffused diodes. Maximum voltage rating is about 100 V. Thus, assertion is a false statement.
In a schottky diode, a thin epitaxial layer is grown on n-type base (substrate). On the epitaxial layer metal (gold, chromium or platinum) is deposited to form a thin layer. This metallic layer is surrounded by a ring of insulating material such as SiO2. Thus reason is a true statement.
In a schottky diode, a thin epitaxial layer is grown on n-type base (substrate). On the epitaxial layer metal (gold, chromium or platinum) is deposited to form a thin layer. This metallic layer is surrounded by a ring of insulating material such as SiO2. Thus reason is a true statement.
Most Upvoted Answer
Assertion (A) : A Schottky diode has very high reverse voltage rating ...
To understand the correct answer, let's analyze both the assertion (A) and the reason (R) given in the question.
Assertion (A): A Schottky diode has a very high reverse voltage rating as compared to alloyed and diffused diodes.
Reason (R): In a Schottky diode, the metallic layer is surrounded by a ring of insulating material such as SiO2.
To determine the correctness of the assertion and the reason, we need to evaluate each statement individually.
Explanation of Assertion (A):
A Schottky diode is a type of diode that uses a metal-semiconductor junction instead of a p-n junction like in alloyed and diffused diodes. This metal-semiconductor junction, also known as a Schottky barrier, has certain characteristics that give Schottky diodes advantages over other types of diodes, including a higher reverse voltage rating.
A Schottky diode has a lower forward voltage drop compared to alloyed and diffused diodes, which makes it suitable for high-frequency applications. However, this lower forward voltage also means that the Schottky diode has a higher reverse voltage rating. In other words, it can withstand higher reverse voltages without breaking down.
Explanation of Reason (R):
The reason given in the question is partially correct. In a Schottky diode, there is indeed a metallic layer (usually made of a metal such as aluminum or platinum) that forms the Schottky barrier with the semiconductor material. However, this metallic layer is not surrounded by a ring of insulating material like SiO2. Instead, the metal layer directly contacts the semiconductor material to form the Schottky barrier.
Evaluation of the Assertion and Reason:
Based on the explanations provided above, we can conclude the following:
- Assertion (A) is false because a Schottky diode does not have a very high reverse voltage rating compared to alloyed and diffused diodes. In fact, Schottky diodes usually have a lower reverse voltage rating due to their lower forward voltage drop.
- Reason (R) is true in part because a Schottky diode does have a metallic layer that forms the Schottky barrier. However, it is not surrounded by a ring of insulating material like SiO2.
Therefore, the correct answer is option (D) - Assertion (A) is false, but Reason (R) is true.
Assertion (A): A Schottky diode has a very high reverse voltage rating as compared to alloyed and diffused diodes.
Reason (R): In a Schottky diode, the metallic layer is surrounded by a ring of insulating material such as SiO2.
To determine the correctness of the assertion and the reason, we need to evaluate each statement individually.
Explanation of Assertion (A):
A Schottky diode is a type of diode that uses a metal-semiconductor junction instead of a p-n junction like in alloyed and diffused diodes. This metal-semiconductor junction, also known as a Schottky barrier, has certain characteristics that give Schottky diodes advantages over other types of diodes, including a higher reverse voltage rating.
A Schottky diode has a lower forward voltage drop compared to alloyed and diffused diodes, which makes it suitable for high-frequency applications. However, this lower forward voltage also means that the Schottky diode has a higher reverse voltage rating. In other words, it can withstand higher reverse voltages without breaking down.
Explanation of Reason (R):
The reason given in the question is partially correct. In a Schottky diode, there is indeed a metallic layer (usually made of a metal such as aluminum or platinum) that forms the Schottky barrier with the semiconductor material. However, this metallic layer is not surrounded by a ring of insulating material like SiO2. Instead, the metal layer directly contacts the semiconductor material to form the Schottky barrier.
Evaluation of the Assertion and Reason:
Based on the explanations provided above, we can conclude the following:
- Assertion (A) is false because a Schottky diode does not have a very high reverse voltage rating compared to alloyed and diffused diodes. In fact, Schottky diodes usually have a lower reverse voltage rating due to their lower forward voltage drop.
- Reason (R) is true in part because a Schottky diode does have a metallic layer that forms the Schottky barrier. However, it is not surrounded by a ring of insulating material like SiO2.
Therefore, the correct answer is option (D) - Assertion (A) is false, but Reason (R) is true.
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Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?
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Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?.
Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer?.
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ample number of questions to practice Assertion (A) : A Schottky diode has very high reverse voltage rating as compared to alloyed and diffused diodes.Reason (R) : In a Schottky diode the metallic layer is surrounded by a ring of insulating material such as SiO2.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'D'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
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