Atomic structure and electrical properties of materials MCQs December 24, 2025November 19, 2024 by u930973931_answers 10 min Score: 0 Attempted: 0/10 Subscribe 1. What is the charge of a single electron? (A) 1.6×10−19 C (B) −1.6 C (C) 1.6 C (D) −1.6×10−19 C 2. Which subatomic particle determines the atomic number of an element? (A) Proton (B) Electron (C) Neutron (D) Nucleus 3. What is the primary factor that determines whether a material is a conductor, semiconductor, or insulator? (A) Number of protons in the nucleus (B) Atomic mass (C) Density of the material (D) Band gap energy 4. What type of bond is primarily responsible for the electrical properties of metals? (A) Metallic bond (B) Covalent bond (C) Ionic bond (D) Hydrogen bond 5. Which of the following materials is a good conductor of electricity? (A) Copper (B) Silicon (C) Glass (D) Rubber 6. In an atom, where are the electrons located? (A) Inside the nucleus (B) Orbiting around the nucleus (C) Between protons and neutrons (D) Alongside the nucleus 7. What is the primary electrical property of a semiconductor? (A) It has no free electrons (B) It has a narrow band gap (C) It has a wide band gap (D) It cannot conduct electricity 8. What happens to the electrical conductivity of metals as temperature increases? (A) It increases (B) It decreases (C) It remains constant (D) It fluctuates randomly 9. Which type of material typically has the largest band gap? (A) Conductors (B) Insulators (C) Semiconductors (D) All have the same band gap 10. In a crystalline material, the arrangement of atoms is: (A) Random (B) Periodic and ordered (C) Amorphous (D) Fixed but irregular