Electromagnetism and Capacitance Concepts
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Questions and Answers

What is the purpose of a dielectric in a capacitor?

  • To convert the stored charge into energy
  • To prevent charge storage in the capacitor
  • To increase the amount of charge the capacitor can store (correct)
  • To decrease the amount of charge the capacitor can store
  • Which property determines whether the force between two point charges is attractive or repulsive according to Coulomb's Law?

  • The shape of the charges
  • The medium between the charges
  • The size of the charges (correct)
  • The distance between the charges
  • What type of material is an electrical insulator?

  • A material with free electrons
  • A material with no free electrons (correct)
  • A material with movable protons
  • A material with no individual atoms
  • In an AC generator, what does Back EMF do with respect to the potential difference supplied to the motor?

    <p>Reduces it</p> Signup and view all the answers

    What does an electric field surrounding a charged object cause on any charged object placed within it?

    <p>It exerts a force on the charged object</p> Signup and view all the answers

    How is a cyclotron designed to accelerate particles?

    <p>By changing the direction of the electric field</p> Signup and view all the answers

    What is the definition of Electric Field Strength?

    <p>The work done per unit charge on a positive test charge in bringing it from infinity to that point</p> Signup and view all the answers

    In the context of electromagnetic induction, what happens when an emf is induced in a wire?

    <p>The magnitude of the induced emf equals the rate of change of flux linkage through the circuit</p> Signup and view all the answers

    Which statement best describes an Equipotential?

    <p>A surface of constant potential where no work is done by the field as an object moves along it</p> Signup and view all the answers

    What does Gravitational Field Strength represent?

    <p>The force per unit mass exerted on a small test mass placed within the field</p> Signup and view all the answers

    What characterizes a Geostationary Satellite?

    <p>It orbits above the equator with a 24-hour period, remaining above the same position on Earth</p> Signup and view all the answers

    What is described by Kepler's Third Law?

    <p>The square of an object's orbital period is directly proportional to the cube of its orbital radius</p> Signup and view all the answers

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