Electric Field Concepts
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Questions and Answers

Which of the following is a necessary component of every electric circuit?

  • Energy source (correct)
  • Magnetic field
  • Gravitational force
  • Capacitor

    • What type of material permits electrons to flow freely from particle to particle?

  • Semiconductors
  • Superconductors
  • Insulators
  • Conductors (correct)

    • What is the potential difference between two points in an electric field?

  • The resistance between the points
  • The amount of charge at one point
  • The current flowing between the points
  • The work needed to transfer a charge of 1 C between the points (correct)

    • Which type of electric circuit has only one path for current to flow?

    <p>Series circuit</p> Signup and view all the answers

    What happens to excess charge transferred to an insulator?

    <p>It remains at the initial location of charging</p> Signup and view all the answers

    What is the unit of potential difference?

    <p>Volt</p> Signup and view all the answers

    What does electric current measure?

    <p>The rate of flow of negative charges</p> Signup and view all the answers

    How many electrons pass any point in a wire carrying a current of 1 A each second?

    <p>6.25 x 10^18 electrons</p> Signup and view all the answers

    What is the resistance of a 120-V electric heater drawing a current of 25 A?

    <p>4.8 Ω</p> Signup and view all the answers

    What must be the minimum rating of the fuse in the electric circuit to which a 120-V toaster with a resistance of 12 Ω is connected?

    <p>10 A</p> Signup and view all the answers

    What is the magnitude of the electric field at a point located at (4, -2) m?

    <p>8,000 N/C</p> Signup and view all the answers

    If the charge q = +1.6x10^-19 C moves in an electric field of 1.0 kV/m, what is the force experienced by the charge?

    <p>1.6x10^-16 N</p> Signup and view all the answers

    A charge of -4 nC is located at (0,1) m. What is the magnitude of the electric field at this point?

    <p>-6,000 N/C</p> Signup and view all the answers

    An electron is present in an electric field of 10,000 N/C. What is the force on the electron?

    <p>-1.6x10^-15 N</p> Signup and view all the answers

    Two point charges are located in the y-axis; q1 = 5nC at y = -4 and q2 = -10nC at y = 2. What is the magnitude and direction of the electric field at y = -2?

    <p>Magnitude: 10,000 N/C, Direction: Downward</p> Signup and view all the answers

    What is the definition of an electric field?

    <p>The region around a charged object where electric forces are exerted</p> Signup and view all the answers

    In which direction do the electric field lines point?

    <p>Radially outward from a positive charge and radially inward toward a negative charge</p> Signup and view all the answers

    How is the magnitude of the electric field calculated?

    <p>By dividing the electric force by the charge</p> Signup and view all the answers

    What does it mean when electric field lines are drawn close together?

    <p>The field is strong</p> Signup and view all the answers

    What is the unit of electric field?

    <p>Newton per coulomb (N/C)</p> Signup and view all the answers

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