Electric fields and Coulomb's law Quiz
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5 questions, one answer each
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1. A charge of 5.0 nC experiences a force of 2.0 × 10⁻⁶ N in an electric field. What is the field strength?
- A. 4.0 × 10² N C⁻¹
- B. 2.5 × 10⁻³ N C⁻¹
- C. 1.0 × 10⁻¹⁴ N C⁻¹
- D. 10 N C⁻¹
2. The distance between two point charges is trebled. What happens to the force between them?
- A. It is divided by 3
- B. It is divided by 9
- C. It is multiplied by 3
- D. It is multiplied by 9
3. What is the direction of the electric field at a point near an isolated negative point charge?
- A. Away from the charge
- B. Perpendicular to the line joining the point and the charge
- C. Towards the charge
- D. There is no field
4. The field strength at a distance r from a point charge is E. What is the field strength at a distance 2r from it?
- A. E/2
- B. 2E
- C. 4E
- D. E/4
5. An electron (charge −1.60 × 10⁻¹⁹ C) is in a field of 5.0 × 10³ N C⁻¹. What is the magnitude of the force on it?
- A. 8.0 × 10⁻¹⁶ N
- B. 3.2 × 10¹⁶ N
- C. 8.0 × 10⁻²³ N
- D. 5.0 × 10³ N