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 11
Describe the effect of increasing the magnitude of one of the charges on the electrostatic force between two charges.
Describe the superposition principle as it applies to electrostatic forces.
Explain how the electrostatic force changes if the medium between two charges is changed from air to water.
Explain why Coulomb’s Law is called an inverse square law.
If three charges are placed at the corners of an equilateral triangle, explain how you would find the net force on one of the charges.
If two charges exert a force of 10 N on each other, what will be the force if the distance between them is reduced to half?
State Coulomb’s Law and write its mathematical expression.
What is the effect of the dielectric constant of a medium on the electrostatic force between two charges?
Explain why the electrostatic force between two charges is considered a conservative force.
Suppose two identical point charges are fixed at a distance d apart. A third charge is placed exactly midway between them. If all three charges are positive, describe the direction of the net force on the third charge and explain why.
