Semiconductors - General Questions (5)

Directions to Solve

Semiconductors - General Questions

33.

You have an unknown type of diode in a circuit. You measure the voltage across it and find it to be 0.3 V. The diode might be

A.	a silicon diode.
B.	a germanium diode.
C.	a forward-biased silicon diode.
D.	a reverse-biased germanium diode.

Answer: Option B

Explanation:

No answer description available for this question

34.

The boundary between p-type material and n-type material is called

A.	a diode.
B.	a reverse-biased diode.
C.	a pn junction.
D.	a forward-biased diode.

Answer: Option C

Explanation:

No answer description available for this question

35.

Effectively, how many valence electrons are there in each atom within a silicon crystal?

A.	2
B.	4
C.	8
D.	16

Answer: Option C

Explanation:

No answer description available for this question

36.

Which statement best describes an insulator?

A.	A material with many free electrons.
B.	A material doped to have some free electrons.
C.	A material with few free electrons.
D.	No description fits.

Answer: Option C

Explanation:

No answer description available for this question

37.

For a forward-biased diode, as temperature is ________, the forward current ________ for a given value of forward voltage.

A.	decreased, increases
B.	increased, increases
C.	increased, decreases
D.	decreased, decreases

Answer: Option B

Explanation:

No answer description available for this question

38.

An n-type semiconductor material

A.	is intrinsic.
B.	has trivalent impurity atoms added.
C.	has pentavalent impurity atoms added.
D.	requires no doping.

Answer: Option C

Explanation:

N-type Semiconductor :

An intrinsic semiconductor material is a poor conductor. When a small amount of pentavalent impurity is added to the intrinsic material its conductivity rises sharply. This material formed after the addition of pentavalent impurity to the intrinsic semiconductor material is called N-type material. Addition of small amount of pentavalent atoms in the intrinsic material provides large number of free electrons for conduction.

39.

The wide end arrow on a schematic indicates the ________ of a diode.

A.	ground
B.	direction of electron flow
C.	cathode
D.	anode

Answer: Option D

Explanation:

No answer description available for this question

40.

For a forward-biased diode, the barrier potential ________ as temperature increases.

A.	decreases
B.	remains constant
C.	increases

Answer: Option A

Explanation:

No answer description available for this question

Semiconductors - General Questions (5)

Semiconductors - General Questions

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