Coulomb’s Law
Physics ⇒ Electricity and Magnetism
Coulomb’s Law starts at 9 and continues till grade 12.
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See sample questions for grade 10
Describe how the medium between two charges affects the electrostatic force between them.
Describe the effect of the sign of charges on the direction of the force between them.
Explain why Coulomb’s Law is called an inverse square law.
State Coulomb’s Law.
The force between two charges in air is 5 N. If the same charges are placed in a medium with dielectric constant 5, what is the new force?
The force between two charges is 10 N. If the magnitude of each charge is doubled, what will be the new force?
Two charges exert a force of 2 N on each other. If one charge is tripled, what is the new force?
What happens to the force between two charges if both charges are negative?
Which law governs the force between two stationary point charges?
Write the mathematical formula for Coulomb’s Law.
Explain why Coulomb’s Law cannot be used to calculate the force between two charged spheres if their sizes are not negligible compared to the distance between them.
State two limitations of Coulomb’s Law.
