Question

When an impurity is doped into intrinsic semiconductor, the conductivity of the semiconductor

• A. becomes zero
• B. increases
• C. decreases
• D. remains the same

Hint:

Doping a semiconductor adds impurities, which increases the number of charge carriers and thus the conductivity.

Answer 1

The Correct Option is B

Step 1: Effect of Impurity on Semiconductor.
When an impurity is doped into an intrinsic semiconductor, the number of free charge carriers (electrons or holes) increases. This enhances the conductivity of the material.

Step 2: Conclusion.
Thus, doping increases the conductivity of the semiconductor, and the correct answer is ( increases.