Question

The materials which are useful in making of diodes, transistors and integrated chips (ICs) etc. are

• A. conductors
• B. insulators
• C. semiconductors
• D. alloys

Answer 1

The Correct Option is C

Correct answer: semiconductors 

Explanation:
Semiconductors are materials whose electrical conductivity lies between that of conductors and insulators. They are widely used in electronic components like diodes, transistors, and integrated circuits (ICs). 

Common semiconductor materials include silicon and germanium. 

- Conductors (like copper) are used for wiring, not for making active electronic components.
- Insulators block current and are used for insulation.
- Alloys may be used for some components but are not suitable for diodes and transistors. 

Hence, the correct answer is: semiconductors.