Electric fields and Coulomb's law Quiz
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5 questions, one answer each
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1. The separation of two point charges is halved. What happens to the force between them?
- A. It is halved
- B. It doubles
- C. It is multiplied by 4
- D. It is divided by 4
2. An electric field strength of 2.0 × 10³ N C⁻¹ acts on a charge of 5.0 nC. What is the force on it?
- A. 1.0 × 10⁻⁵ N
- B. 4.0 × 10⁻¹² N
- C. 2.5 × 10¹¹ N
- D. 1.0 × 10⁻³ N
3. What is the electric field strength 0.10 m from a point charge of +2.0 nC?
- A. 1.8 × 10¹ N C⁻¹
- B. 1.8 × 10³ N C⁻¹
- C. 1.8 × 10² N C⁻¹
- D. 1.8 × 10⁻¹ N C⁻¹
4. An electron is placed in a field that points to the east. In which direction is the force on the electron?
- A. East
- B. West
- C. Upwards
- D. There is no force
5. Which statement about Coulomb's law is correct?
- A. The force is proportional to r
- B. The force is proportional to the sum of the charges
- C. The force is proportional to the product of the charges
- D. The force is independent of the medium in all cases