Electric Charges and Fields - Coulomb's Law

Grade 12 Physics — Electric Charges and Fields - Coulomb's Law: 25 practice questions with instant scoring and explanations.

1. SI unit of electric charge
2. If distance doubled, force becomes
3. Two 2C and 3C at 0.5m. F=? (k=9×10⁹)
4. Two identical charges repel 10N at 1m
5. Charges doubled, distance halved, F becomes
6. Coulomb constant k =
7. 5μC and -3μC at 2m
8. Three charges, zero force on middle
9. Superposition principle
10. +q,-q at 2d, force on +Q at center
11. SI unit of k
12. Two 1C at 1m repel
13. Coulomb's law applies to
14. Spheres +4μC,-2μC touch, separate 3m
15. Two protons 1Å apart
16. Force in medium vs vacuum
17. Two electrons
18. +q,-q,+q,-q at square corners
19. Distance 3×, force becomes
20. Dimension of k
21. q and r doubled, F becomes
22. +2C and +3C at 1m repel
23. Force varies as
24. Coulomb force is
25. Coulomb constant called