Question

Doping of semiconductor:
1. increases its conductivity.
2. decreases its conductivity.
3. increases its resistivity.
4. decreases its resistivity.
Which option is correct?

• A. Only 1
• B. Only 2
• C. 2 and 3
• D. 1 and 4

Answer 1

The correct option is D 1 and 4

Due to doping of pure semiconductor with trivalent or pentavalent atoms, number density of majority charge carriers increases which increases the conductivity of semiconductor and hence decreases its resistivity.