Quiz 1: Band theory

What is the range of bandgap in a semiconductor?

• 0.7 eV to 1.2 eV

• 2.4 eV to 5 eV

• 8eV to 10 eV

• 0.2 eV

In __________ the valence band and conduction band overlaps

• Semiconductor

• Insulator

• Conductor

• All the above

In Insulator the bandgap value is above__________

• 2eV

• 3eV

• 4eV

• 5eV

The _________ lies at centre of the valence band and conduction band.

• Donor energy level

• Acceptor energy level

• Fermi energy level

At 0K, intrinsic semiconductors are ________

• Insulators

• Conductors