Question
Download Solution PDFIdentify the INCORRECT statement from the options given below.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Option 4.
Key Points
- Option 4 states that "Certain materials called semiconductors by definition have zero resistivity or infinite conductivity," which is incorrect.
- Semiconductors have a moderate level of conductivity, which is between that of insulators and conductors.
- Semiconductors like silicon and germanium do not have zero resistivity; their resistivity decreases with increasing temperature.
- In semiconductors, conductivity can be controlled by adding impurities, a process known as doping.
Additional Information
- Conductors
- Materials that allow the flow of electric current with minimal resistance.
- Examples include metals like copper, silver, and aluminum.
- Insulators
- Substances with very low conductivity, preventing the flow of electric current.
- Examples include glass, ceramics, and plastics.
- Semiconductors
- Materials with conductivity between conductors and insulators.
- Used in electronic devices like transistors and diodes.
- Examples include silicon and germanium.
- Doping
- The process of adding impurities to semiconductors to change their electrical properties.
- Increases the number of charge carriers in the material.
Last updated on Dec 9, 2024
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