Module 1.2

Semiconductor Materials Quiz

Use the information given in Semiconductors Module 1.0 and 1.1. Submit your answers and see how many you get right. If you get any answers wrong, just re-read the suggested module or section to find the right answer, and learn more about Semiconductor Materials as you go.

1.

An element is a sub-division of matter. Which of the following can be described as an element?

a) Salt.
b) Water.
c) Air.
d) Oxygen.

2.

Which of the following does not carry an electric charge?

a) Proton
b) Neutron
c) Electron
d) Ion

3.

How many neutrons are present in an atom of silicon?

a) 0
b) 8
c) 14
d) 24

4.

Which of the following describes the arrangement of electrons in an atom of silicon?

a) K shell = 2, L shell = 4, M shell = 8
b) K shell = 2, L shell = 8, M shell = 4
c) K shell = 2, L shell = 4, M shell = 18
d) K shell = 2, L shell = 8, M shell = 18

5.

Which of the following describes the amount of resistivity present in a semiconductor?

a) Higher than that present in a conductor, but lower than that present in an insulator.
b) Higher than that present in an insulator, but lower than that present in a conductor.
c) Higher than that present in a conductor or an insulator.
d) Lower than that present in a conductor or an insulator.

6.

Why does thermal runaway happen in a semiconductor?

a) Because heating the semiconductor allows an increase in current flow.
b) Because current flow in a semiconductor is inversely proportional to temperature.
c) Because the valence electrons in a semiconductor collide with thermally released electrons.
d) Because the bond between the valence electrons and the nucleus in a semiconductor is much weaker than in a conductor.

7.

The valence electrons in a silicon atom are present in which of the following electron shells?

a) K
b) M
c) K,L and M
d) L

8.

Which of the following could be used as a donor atom used to produce N type semiconductor material?

a) Aluminium
b) Boron.
c) Phosphorus
d) Germanium

9.

What would be a typical proportion of donor atoms added to pure silicon during the fabrication of P type silicon?

a) 1 donor atom per 100,000 silicon atoms.
b) 1 donor atom per 1,000,000 silicon atoms.
c) 1 donor atom per 10,000,000 silicon atoms.
d) 1 donor atom per 100,000,000 silicon atoms.

10.

What type of diode uses a compound of gallium arsenide in its construction?

a) Light emitting diode.
b) Rectifier diode.
c) Schottky barrier diode
d) Zener diode.

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- Semiconductors

Module 1.2

Semiconductor Materials Quiz

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