Semiconductor Devices Test

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Semiconductor Devices Test - 84

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Weekly Quiz Competition

Question 1
4 / -1

When N–type of semiconductor is heated

A
Number of electrons increases while that of holesdecreases

B
Number of holes increases while that of electronsdecreases

C
Number of electrons and holes remains same

D
Number of electrons and holes increase equally
Question 2
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
40kΩ

B
4kΩ

C
200 Ω

D
400 Ω

Solution
Question 3
4 / -1

Gas is

A
Element semiconductor

B
Alloy semiconductor

C
Bad conductor

D
Metallic semiconductor
Question 4
4 / -1

If n_e and n_h are the number of electrons and holes in a semiconductor heavily doped with phosphorus, then

A
n_e>>n_h

B
n_e<h

C
n_e ≤n_h

D
n_e=n_h

Solution
Question 5
4 / -1

An N–type and P–type silicon can be obtained by dopingpure silicon with

A
Arsenic and Phosphorous

B
Indium and Aluminum

C
Phosphorous and Indium

D
Aluminum and Boron
Question 6
4 / -1

The state of the energy gained by valance electrons when the temperature is raised or when electric field isapplied is called as

A
Valance band

B
Conduction band

C
Forbidden band

D
None of these
Question 7
4 / -1

A pure semiconductor behaves slightly as a conductorat

A
Room temperature

B
Low temperature

C
High temperature

D
Both (b) and (c)
Question 8
4 / -1

The band gap in germanium and silicon in eV respectively is

A
0.7, 1.1

B
1.1, 0.7

C
1.1, 0

D
0, 1.1
Question 9
4 / -1

At room temperature, a P-type semiconductor has

A
Large number of holes and few electrons

B
Large number of free electrons and few holes

C
Equal number of free electrons and holes

D
No electrons or holes
Question 10
4 / -1

In a semiconductor

A
There are no free electrons at any temperature

B
The number of free electrons is more than that in a conductor

C
There are no free electrons at 0 K

D
None of the above

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Semiconductor Devices Test - 84

Result

Semiconductor Devices Test - 84

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SHARING IS CARING

Question 1

Number of electrons increases while that of holesdecreases

Number of holes increases while that of electronsdecreases

Number of electrons and holes remains same

Number of electrons and holes increase equally

Question 2

40kΩ

4kΩ

200 Ω

400 Ω

Solution

Question 3

Element semiconductor

Alloy semiconductor

Bad conductor

Metallic semiconductor

Question 4

ne>>nh

ne<h

ne ≤nh

ne=nh

Solution

Question 5

Arsenic and Phosphorous

Indium and Aluminum

Phosphorous and Indium

Aluminum and Boron

Question 6

Valance band

Conduction band

Forbidden band

None of these

Question 7

Room temperature

Low temperature

High temperature

Both (b) and (c)

Question 8

0.7, 1.1

1.1, 0.7

1.1, 0

0, 1.1

Question 9

Large number of holes and few electrons

Large number of free electrons and few holes

Equal number of free electrons and holes

No electrons or holes

Question 10

There are no free electrons at any temperature

The number of free electrons is more than that in a conductor

There are no free electrons at 0 K

None of the above

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n_e>>n_h

n_e<h

n_e ≤n_h

n_e=n_h