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Questions and Answers
What is the mathematical expression for the electrical force between two stationary point charges according to Coulomb's Law?
What is the mathematical expression for the electrical force between two stationary point charges according to Coulomb's Law?
- $Fe = \frac{q_1 q_2}{k_e r^2}$
- $Fe = \frac{k_e q_1 q_2}{r^2}$ (correct)
- $Fe = \frac{k_e r^2}{q_1 q_2}$
- $Fe = k_e q_1 q_2 r^2$
What is the SI unit of charge?
What is the SI unit of charge?
- Volt (V)
- Coulomb (C) (correct)
- Ampere (A)
- Newton (N)
When are the electrical forces between two point charges attractive?
When are the electrical forces between two point charges attractive?
- If one charge is negative and the other is neutral
- If one charge is positive and the other is neutral
- If the charges are of opposite sign (correct)
- If the charges are of like sign
What does the term 'point charge' refer to?
What does the term 'point charge' refer to?
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What did Charles Coulomb measure to determine the magnitudes of electric forces between two small charged spheres?
What did Charles Coulomb measure to determine the magnitudes of electric forces between two small charged spheres?
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