Question:
When a small amount of impurity atoms are added to a semiconductor then generally its resistivity
When a small amount of impurity atoms are added to a semiconductor then generally its resistivity
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Remember, doping a semiconductor introduces charge carriers and reduces its resistivity, improving its conductivity.
Updated On: Jan 27, 2026
- decreases.
- increases.
- does not change.
- may increase or decrease depending upon the percentage of doping.
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The Correct Option is A
Solution and Explanation
Step 1: Effect of impurities on semiconductor.
When impurities are added to a semiconductor (a process known as doping), they introduce free charge carriers which increase the conductivity, thereby decreasing the resistivity.
Step 2: Conclusion.
Thus, the correct answer is (A) decreases.
When impurities are added to a semiconductor (a process known as doping), they introduce free charge carriers which increase the conductivity, thereby decreasing the resistivity.
Step 2: Conclusion.
Thus, the correct answer is (A) decreases.
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