Physics Group - II (3110018) MCQs

MCQs of Electronic Materials

Showing 1 to 10 out of 23 Questions
1 2 3
1.

The Fermi-Dirac distribution function deals with

(a)

Band theory of solids
(b)

Probability of occupancy of electron levels
(c)

Classification of solids
(d)

None
Answer:

Option (b)

2.

Fermi energy is the maximum energy possessed by an electron in a conductor at

(a)

0 K

 
(b)

273 K

 
(c)

0°C

 
(d)

273°C
Answer:

Option (a)

3.

In metals at absolute temperature, all the energy levels lying above Fermi level are

(a)

Filled 
(b)

Partially filled
(c)

Vacant
(d)

none
Answer:

Option (c)

4.

The probability of occupancy of Fermi level at any temperature other than 0 K is

(a)

Zero
(b)

one
(c)

∞
(d)

0.5
Answer:

Option (d)

5.

Semiconductors have

(a)

Zero coefficient of resistivity
(b)

Negative coefficient of resistivity
(c)

Positive coefficient of resistivity
(d)

Infinite coefficient of resistivity
Answer:

Option (b)

6.

The resistivity of a semiconductor at room temperature is of the order of

(a)

10-2 to 10-5 Ω cm

 
(b)

10-3 to 106 Ω cm

 
(c)

106 to 108 Ω cm

 
(d)

1010 to 1012 Ω cm

Answer:

Option (b)

7.

Which of the following statement is true?

(a)

The forbidden gap in metal is greater than the forbidden gap in a semiconductor
(b)

Metals and semiconductors have the same forbidden gap
(c)

The forbidden gap in a semiconductor is greater than the forbidden gap in metal and less than the forbidden gap in an insulator
(d)

None
Answer:

Option (c)

8.

At absolute zero temperature, an intrinsic semiconductor behaves as a

(a)

Conductor
(b)

n-type semiconductor
(c)

p-type semiconductor
(d)

insulator
Answer:

Option (d)

9.

The distinction between conductors, insulators, and semiconductors is largely concerned with

(a)

their ability to conduct current
(b)

the type of crystal lattice
(c)

binding energy of their electrons
(d)

relative widths of their energy gaps
Answer:

Option (d)

10.

In an intrinsic semiconductor at 0 K, the energy level that lies in the middle of the forbidden band is

(a)

donor level
(b)

acceptor level
(c)

fermi level
(d)

none
Answer:

Option (c)

Showing 1 to 10 out of 23 Questions
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