Assertion (A): Silicon is the most favoured semiconductor material. Reason (R):

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Question
Assertion (A): Silicon is the most favoured semiconductor material.
Reason (R): PIV for silicon diode is more than that for germanium diode.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

Correct Answer

A is true but R is false

Explanation

Higher PIV for silicon is a definite advantage.

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A. 25�
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Options
A. ac signal is zero
B. ac signal is low
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7. Which of the following statement about the amplitude limiter is not valid?
Options
A. Leak type bias must be used
B. Output must be tuned
C. The circuit is always biased in class C, by virtue of the leak type bias
D. When the input increases past the threshold of limiting, the gain decreases to keep the output constant

8. Assertion (A): Helium, Argon and Neon are gaseous at room temperature.
Reason (R): The atoms in Helium, Argon and Neon are chemically extremely inactive.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

10. The law that (where K is thermal conductivity, ? is electrical conductivity and T is absolute temperature) for all metals is equal to a universal constant is known as
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A. Lorentz law
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C. Curie Weiss law
D. Kittel law

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