Physics of Semiconductors - MCQs

  Physics of Semiconductors

Q.1

Most widely used semiconductor is ::

(a) Ge

(b) Si

(c) C

(d) In

Ans:: b

Q.2

An intrinsic semiconductor has ::

(a) Equal number of free electrons and holes

(b) many electrons and few holes

(c) many holes and few electrons

Ans:: a 

Q.3

As a semiconductor Si and Ge may be classified as ::

(a) Direct gap type

(b) indirect gap type

(c) compensated type

(d) compound type

Ans:: b

Q.4 

Semiconductor suitable for light emitting diode is::

(a) Si

(b) Ge

(c) GaAs

(d) C

Ans:: c

Q.5

For the manufacture of tunnel diode one uses a semiconductor which is ::

(a) degenerate

(b) non-degenerate

(c) compensated

(d) intrinsic

Ans:: a

Q.6

An intrinsic semiconductor when heated to very high temperature it behaves like ::

(a) n - type

(b) p - type

(c) intrinsic

(d) metal

Ans:: c

Q.7

The equation of continuity in semiconductor is the mathematical statement of the law of conservation of ::

(a) energy

(b) momentum

(c) charge

(d) mass

Ans:: c

Q.8

In a semiconductor the current flow depends on the mechanism of  ::

(a) drift

(b) diffusion

(c) both drift and diffusion

Ans:: c

Q.9

The type of semiconductor, n-type or p-type, can be identified by using  ::

(a) Early effect

(b) Tunnel effect

(c) Photovoltaic effect

(d) Hall effect

Ans:: d

Q.10

Temperature coefficient of carbon resistors is ::

(a) zero

(b) positive

(c) negative

(d) both positive and negative

Ans:: c