Physics – Multiple Choice Questions (MCQs)

1. 49. What is electric resistance?

   • A. The opposition to the flow of electric current
   • B. The force that drives electric current
   • C. The energy dissipated by a circuit
   • D. The total charge in a circuit

2. 50. What is a circuit?

   • A. A closed path through which electric current can flow
   • B. An open path with no current
   • C. A device that stores electric charge
   • D. A material that does not conduct electricity

3. 51. What are conductors?

   • A. Materials that resist the flow of electricity
   • B. Materials that allow electricity to flow easily
   • C. Materials that store electric charge
   • D. Materials that produce electricity

4. 52. What are insulators?

   • A. Materials that allow electricity to flow easily
   • B. Materials that strongly resist the flow of electricity
   • C. Materials that amplify electric current
   • D. Materials that convert electricity to light

5. 53. What is a semiconductor?

   • A. A material that conducts electricity perfectly
   • B. A material that does not conduct electricity at all
   • C. A material with conductivity between that of a conductor and an insulator
   • D. A material that becomes a superconductor at room temperature

6. 54. What is a magnetic field?

   • A. A region around a magnet or a moving electric charge that exerts a magnetic force
   • B. A region with no electric charge
   • C. A region of high pressure
   • D. A region that emits light

7. 55. What is electromagnetism?

   • A. The interaction between electric and magnetic fields
   • B. The study of static electricity
   • C. The study of permanent magnets
   • D. The force of gravity

8. 56. What is electromagnetic induction?

   • A. The production of an electromotive force across an electrical conductor in a changing magnetic field
   • B. The attraction between opposite magnetic poles
   • C. The repulsion between like electric charges
   • D. The heating of a conductor by electric current