Semiconductors

A semiconductor is formed by...…...... bonds

• Electrovalent

• Covalent

• Co-ordinate

• None of the above

The most commonly used semiconductor is ..........

• Silicon

• Sulphur

• Carbon

• Germanium

A hole in a semiconductor is defined as ...........

Addition of pentavalent impurity to a semiconductor create many ...............

In a semiconductor, current conduction is due to........

• holes

• protons

• free electrons

• none of the above

The random motion of holes and free electrons due to thermal agitation is called ……….

• Ionisation

• Diffusion

• Effusion

• Pressure

As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor ………..

• Remains the same

• Decreases

• Increases

• None of the above