Question

The forbidden energy gap is the minimum in

• A. a condcutor
• B. a semiconductor
• C. a superconductor
• D. an insulator

Answer 1

Answer: (C)

a superconductor

The free electrons are charge carriers and are reason for conduction of current.

Those electrons which can easily get free from nuclear effect and become free to conduct electricity are the free electrons.

Forbidden energy gap is the energy required by the electron in outermost orbit of atom to get free and become a free electron.

The less is the forbidden energy gap, more free electron will be there even with small electric field and hence more conductivity.

Super conductors have minimum forbidden energy gap and has maximum conductivity.

Answer-(C)