Electric Fields and Coulomb's Law
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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?

  • $Fe = \frac{q_1 q_2}{k_e r^2}$
  • $Fe = \frac{k_e q_1 q_2}{r^2}$ (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?

  • Volt (V)
  • Coulomb (C) (correct)
  • Ampere (A)
  • Newton (N)

    • 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?

    <p>A particle with zero size that carries an electric charge</p> Signup and view all the answers

    What did Charles Coulomb measure to determine the magnitudes of electric forces between two small charged spheres?

    <p>The separation between the charged spheres</p> Signup and view all the answers

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