Board MCQ & FIB on II Physics (33) Chapter 14: S Electronics

Which one of the following is an example for a semiconductor?

• Cu

• Au

• Ge

• Al

The energy band above the valence band is called

• Conduction band

• Forbidden Band

• Semiconductor band

• Insulator band

Pentavalent dopants have a valency of

• 3

• 4

• 5

• 6

The diode used as a voltage regulator is

• Zener diode

• Light Emitting Diode

• Photo diode

• Solar cell

Tetravalent among the following is

• Silicon

• Boron

• Indium

• Aluminium

In an intrinsic semiconductor, number of free electrons is

• Greater than number of holes

• Lesser than number of holes

• Equal to number of holes

• More than number of atoms

In a material conduction band and valence band overlap. Material is a

• Semi-conductor

• Insulator

• Metal

• Doped semiconductor

A p-type semiconductor is

• Positively charged

• Negatively charged

• Electrically neutral

• An intrinsic semiconductor

A n-type semiconductor is

• Positively charged

• Negatively charged

• Electrically neutral

• An intrinsic semiconductor

The vacancy with effective positive electronic charge created in the valence band when an electron in a semiconductor jumps to conduction band is called

• Positron

• Electron

• Hole

• Proton