Semiconductor Devices Test

Result

Semiconductor Devices Test - 49

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Weekly Quiz Competition

Question 1
4 / -1

In a P-type semiconductor

A
Current is mainly carried by holes

B
Current is mainly carried by electrons

C
The material is always positively charged

D
Doping is done by pentavalent material
Question 2
4 / -1

At ordinary temperature, the electrical conductivity of semiconductor in mho/metre is the range

A
10³ to 10^–3

B
10⁶ to 10⁹

C
10^–6 to 10^–10

D
10^–10 to 10^–16
Question 3
4 / -1

When the temperature of silicon sample is increased from 27^oC to 100^oC, the conductivity of silicon will be

A
Increased

B
Decreased

C
Remain same

D
Zero
Question 4
4 / -1

A light emitting diode (LED) has a voltage drop of 2 volt across it and passes a current of 10 mA when it operates with a 6 volt battery through a limiting resistor R. The value of R is

A
40 kΩ

B
4 kΩ

C
200 Ω

D
400 Ω

Solution
Question 5
4 / -1

In N-type semiconductors, majority charge carriers are

A
Holes

B
Protons

C
Neutrons

D
Electrons
Question 6
4 / -1

Semiconductor is damaged by the strong current due to

A
Lack of free electron

B
Excess of electrons

C
Excess of proton

D
None of these
Question 7
4 / -1

GaAs is

A
Element semiconductor

B
Alloy semiconductor

C
Bad conductor

D
Metallic semiconductor
Question 8
4 / -1

Which of the energy band diagrams shows in the figure correspond to that of a semiconductor

A

B

C

D
Question 9
4 / -1

To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is

A
Monovalent

B
Divalent

C
Trivalent

D
Pentavalent
Question 10
4 / -1

For germanium crystal, the forbidden energy gap in joules is

A
1.12 × 10^–19

B
1.76 × 10^–19

C
1.6 × 10^–19

D
Zero

Solution