31
When donor type impurity is added to the semiconductor system. Then
A)
electrons will be generated and N-type material
B)
electrons will be generated and P-type material
C)
Holes will be generated and P-type material
D)
Holes will be generated and N-type material
Answer & Solution
Answer: Option
A
32
Assertion (A) An N-type semiconductor has a large number of electrons but still it is electrically neutral.Reason (R) An N-type semiconductor is obtained by doping an intrinsic semiconductor with a pentavalent impurity.
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
Answer & Solution
Answer: Option
B
33
Which of the following is widely used in making semiconductor chips?
A)
Radium
B)
Sodium
C)
Germanium
D)
Sulphur
Answer & Solution
Answer: Option
C
34
Doping in semi-conductor glossary is:
A)
Semi-conductor is a process of purifying matter
B)
Doping is a process of increasing the electrons or holes
C)
Is a process of increasing external atoms
D)
Is a process of increasing the biased potential
Answer & Solution
Answer: Option
B
35
Match the following.
List-I List-II
a. Germanium at 0 K
1. n-type semiconductor
b. Germanium at room temperature
2. p-type semiconductor
c. Germanium doped with indium
3. Insulator
d. Germanium doped with arsenic
4. Intrinsic semiconductor
A)
a-1, b-2, c-3, d-4
B)
a-4, b-3, c-2, d-1
C)
a-3, b-4, c-2, d-1
D)
a-4, b-3, c-1, d-2
Answer & Solution
Answer: Option
C
36
The purpose of the amplifier is to:
A)
To increase the voltage, power or current, of the input signals
B)
Decreasing the weighted signal under its input
C)
Causing distortion in the weighted signal
D)
Both B and C
Answer & Solution
Answer: Option
A
37
Which of the following is not a semiconductor?
A)
Silicon
B)
Krypton
C)
Selenium
D)
Germanium
Answer & Solution
Answer: Option
B
38
Integrated circuits are made up of which of the following?
A)
Aluminium
B)
Silicon
C)
Glass
D)
Iron
Answer & Solution
Answer: Option
B
39
The diode is used as a . . . . . . . .
A)
rectifier
B)
amplifier
C)
magnifier
D)
purifier
Answer & Solution
Answer: Option
A
40
The term LASER stand for
A)
Light Amplification by Stimulated Emission of Radiation
B)
Light Amplification by Spontaneous Emission of Radiation
C)
Light Amplification by Stimulated Emission of Rays
D)
Light Amplification by Stimulated Energy of Radiation
Answer & Solution
Answer: Option
A
