Electric Charge Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What happens when two negatively charged objects are brought close together?
- A. They attract
- B. They repel
- C. Nothing happens
- D. They become neutral
2. What is the unit of electric charge?
- A. Volt
- B. Ampere
- C. Coulomb
- D. Ohm
3. A plastic rod is rubbed with a cloth and becomes negatively charged. What has happened?
- A. The rod has gained protons from the cloth
- B. The rod has gained electrons from the cloth
- C. The rod has lost electrons to the cloth
- D. The cloth has become positively charged by gaining electrons
4. A positive test charge is placed at a point near an isolated negative point charge. In which direction does it experience a force, and what does this tell you about the field direction there?
- A. Away from the negative charge; field direction points away from it
- B. Towards the negative charge; field direction points towards the negative charge at that point
- C. No force at all, since only like charges create fields
- D. Sideways, perpendicular to the line joining the charges
5. A metal rod is rubbed with a cloth in the same way as an insulating plastic rod, but the metal rod shows no sign of being charged afterwards. Explain why, in terms of conductors and insulators.
- A. Metals cannot lose or gain electrons under any circumstances
- B. The metal rod is a conductor, so any charge produced disperses through the free electrons rather than staying localised
- C. The cloth only works on plastic, not on any other material
- D. Metals repel electrons, so friction cannot transfer any charge to them