Conductors, semiconductors, and insulators MCQs December 24, 2025November 19, 2024 by u930973931_answers 10 min Score: 0 Attempted: 0/10 Subscribe 1. Which of the following materials is a good conductor of electricity? (A) Copper (B) Glass (C) Wood (D) Rubber 2. What is the primary characteristic of an insulator? (A) It has free electrons (B) It has a high density of charge carriers (C) It does not allow the flow of electric current (D) It is magnetic in nature 3. Semiconductors are characterized by their: (A) High conductivity (B) Low conductivity (C) No conductivity (D) Intermediate conductivity 4. Which of the following is a semiconductor material? (A) Glass (B) Copper (C) Silicon (D) Rubber 5. In semiconductors, the energy gap (band gap) is typically: (A) 0 eV (B) Moderate (C) Very small (D) Very large 6. What happens to the conductivity of a semiconductor with increasing temperature? (A) It decreases (B) It increases (C) It remains constant (D) It becomes zero 7. Which of the following is an example of an insulator? (A) Iron (B) Silicon (C) Rubber (D) Aluminum 8. The valence band and conduction band in a conductor: (A) Are far apart (B) Overlap (C) Are separated by a wide gap (D) Do not exist 9. Which of these is a property of conductors? (A) Low resistance (B) High resistance (C) Non-magnetic (D) Brittle 10. A material with a band gap of 1.1 eV is likely to be a: (A) Conductor (B) Semiconductor (C) Insulator (D) Superconductor