Semiconductor Devices Test

Result

Semiconductor Devices Test - 30

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is a crystalline solid?

A
Graphite

B
Calcite

C
Gallium

D
Oxygen
Question 2
4 / -1

Atomic packing factor for a force centred cubic cell is

A

B

C

D

Solution
Question 3
4 / -1

With the fall of temperature, the forbidden energy gap of a semiconductor

A
Increases

B
decreases

C
remains unchanged

D
sometime increases and sometimes decreases
Question 4
4 / -1

In a semiconductor, the forbidden energy gap between the valence band and the conduction band is of the order is

A
1 MeV

B
0.1 MeV

C
1 eV

D
5 eV
Question 5
4 / -1

The ratio of electron and hole current in a semiconductor is 7/4 and the ratio of drift velocities of electrons and holes is 5/4, then ratio of concentrations of electrons and holes will be

A
5/7

B
7/5

C
25/49

D
49/25

Solution
Question 6
4 / -1

Three semiconductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is

A
tellurium, germanium, silicon

B
tellurium, silicon, germanium

C
silicon, germanium, tellurium

D
Silicon, tellurium, germanium
Question 7
4 / -1

The Fermi level of an intrinsic semiconductor is pinned at the centre of the band gap. The probability of occupation of the highest electron state in valence band at room temperature, will be

A
Zero

B
Between zero and half

C
Half

D
One
Question 8
4 / -1

In the half wave rectifier circuit operating from 50 hz mains frequency, the fundamental frequency in the ripple would be

A
25 hz

B
50 hz

C
70.7 hz

D
100 hz
Question 9
4 / -1

Which filter circuit is better?

A
π type

B
Choke input type

C
Capacitor type

D
None of the above
Question 10
4 / -1

Two identical p-n junctions may be connected in series with a battery in three ways as shown in the adjoining figure. The potential drop across the p-n junctions are equal in

A
circuit 1 and circuit 2

B
circuit 2 and circuit 3

C
circuit 3 and circuit 1

D
circuit 1 only