Energy Graph Diagram

Q.

The probability of electrons to be found in the conduction band of an intrinsic semiconductor at a finite temperature

1. Decreases exponentially with increasing band gap

2. Increases exponentially with increasing band gap

3. Decreases with increasing temperature

4. Is independent of the temperature and the band gap

Q.

Thermionic emission from a heated filament varies with its temperature T as

1. 

2. 

3. 

4. 

Q.

In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of

1. 

2. 

3. 

4. 

Q.

The expected energy of the electrons at absolute zero is called [RPET 1996]

1. Work function

2. Potential energy

3. Fermi energy

4. Emission energy

Q.

Three semi-conductors are arranged in the increasing order of their energy gap as follows. The correct arrangement is :

1. Tellurium, germanium, silicon

2. Tellurium, silicon, germanium

3. Silicon, germanium, tellurium

4. Silicon, tellurium, germanium