Question

The addition of pentavalent impurities ________ of the semiconductor.

• A. brings no change to the conductivity
• B. decreases the conductivity
• C. increases the conductivity
• D. reduces the formation of free electrons

Answer 1

The correct option is C increases the conductivity

The additional pentavalent impurity added to the semi conductor increases the concentration of free electrons in a semi-conductor.

Due to this increase in number of free electrons in a semi-conductor conductivity of semi-conductor increases.

Hence option C is correct.