Electrical Properties of Solids

Semiconductors have electrical conductivities in the range from

When an element  of group $14$ is doped with an element of group $15$

$\mathrm{n}$-type semiconductor are

The solids which are good conductor of electricity should have conductivities in the order of 

Which of the following covalent solid is the conductor of electricity?

Assertion : Semiconductors are solids with conductivities in the intermediate range from ${10}^{-6}-{10}^4 {\mathrm{ohm}}^{-1} {\mathrm{m}}^{-1}.$

Reason : Intermediate conductivity in semiconductor is due to partially filled valence band.

Pure silicon doped with phosphorus is

To get an n-type semiconductor from silicon, it should be doped with a substance with valency:

Which of the following is true about the charge acquired by $\mathrm{p}$-type semiconductors?

Pure germanium is an example of-

Which kind of defects are introduced by doping?

Which of the following oxides behaves as conductor or insulator depending upon temperature?

Which of the following oxides shows electrical properties like metals?

n-type semiconductor is formed when trace amount of impurity is added to silicon. The number of electrons in the impurity atom must be

p-type semiconductor is formed when trace amount of impurity is added to silicon. The number of valence electrons in the impurity atom must be

Doping of silicon with $\mathrm{P}$ or $\mathrm{Al}$ increases the conductivity. The difference in these two cases is

Electrostatic separation method is used to seperate PbS from ZnS. The property utilized in this method is

What we get if pure germanium is doped with arsenic?

Band theory predicts that magnesium is an insulator. However, in practice it acts as a conductor due to

The electrical resistivity of a semiconductor