Question:
Semiconductors are
Semiconductors are
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Doping is the process of adding impurities to a pure semiconductor to change its electrical properties.
Updated On: Apr 24, 2026
- having positive temperature coefficients
- having forbidden energy gap $\mathrm{E_g}>3\,\mathrm{eV}$
- made to conduct more by adding impurity elements
- placed in the VI group of elements in periodic table
- having electrons and ions as charge carriers
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Semiconductors have conductivity between conductors and insulators. Their conductivity can be increased by doping.
Step 2: Detailed Explanation:
(A) Incorrect: Semiconductors have negative temperature coefficient.
(B) Incorrect: Eg for semiconductors is ~1 eV; >3 eV is for insulators.
(C) Correct: Doping adds impurities to increase conductivity.
(D) Incorrect: Si and Ge are Group IV elements.
(E) Incorrect: Charge carriers are electrons and holes, not ions.
Step 3: Final Answer:
The correct statement is that semiconductors are made to conduct more by adding impurity elements.
Semiconductors have conductivity between conductors and insulators. Their conductivity can be increased by doping.
Step 2: Detailed Explanation:
(A) Incorrect: Semiconductors have negative temperature coefficient.
(B) Incorrect: Eg for semiconductors is ~1 eV; >3 eV is for insulators.
(C) Correct: Doping adds impurities to increase conductivity.
(D) Incorrect: Si and Ge are Group IV elements.
(E) Incorrect: Charge carriers are electrons and holes, not ions.
Step 3: Final Answer:
The correct statement is that semiconductors are made to conduct more by adding impurity elements.
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