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Questions and Answers
What does Coulomb's law describe?
What does Coulomb's law describe?
How does the force between two charges change if the distance between them doubles?
How does the force between two charges change if the distance between them doubles?
What happens to the electrostatic force if the magnitude of both charges is doubled?
What happens to the electrostatic force if the magnitude of both charges is doubled?
What is the mathematical form of Coulomb's law?
What is the mathematical form of Coulomb's law?
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What does the constant 'k' represent in Coulomb's law?
What does the constant 'k' represent in Coulomb's law?
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If the distance between two point charges is tripled, how does the electrostatic force between them change?
If the distance between two point charges is tripled, how does the electrostatic force between them change?
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Study Notes
Coulomb's Law
- Coulomb's law describes the electrostatic force between two point charges.
Force Between Charges
- If the distance between two charges doubles, the force between them decreases to one-quarter of its original value.
- If the magnitude of both charges is doubled, the electrostatic force between them increases to four times its original value.
Mathematical Form
- The mathematical form of Coulomb's law is F = k(q1 q2) / r^2, where F is the electrostatic force, k is a constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them.
The Constant 'k'
- The constant 'k' represents the Coulomb's constant, which is approximately 8.99 x 10^9 N m^2 C^2.
Distance and Force
- If the distance between two point charges is tripled, the electrostatic force between them decreases to one-ninth of its original value.
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Description
Test your knowledge on Coulomb's law, which describes the force between two charges. Understand how the force changes with respect to distance and charge magnitude, and grasp the mathematical form of this fundamental law in physics.
