Physics 51 Module 11: Electric Charge and Electric Field
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Questions and Answers

What is electric charge?

  • A physical property carried by certain subatomic particles (correct)
  • A characteristic that is only present in metals
  • A force that acts between two objects
  • A type of electromagnetic wave

    • What is the principle of superposition in relation to electric charge?

  • The total charge in an isolated system is always zero
  • The total charge in an isolated system is always conserved (correct)
  • The total charge in an isolated system is always positive
  • The total charge in an isolated system is always negative

    • What is the property of electric charge known as quantization of charge?

  • The magnitude of the charge of an electron is random
  • The magnitude of the charge of an electron is zero
  • The magnitude of the charge of an electron is a natural unit of charge (correct)
  • The magnitude of the charge of an electron is infinite

    • What is the direction of the electric field of a positive point charge?

    <p>Away from the charge</p> Signup and view all the answers

    What is the unit of electric field magnitude?

    <p>1 N/C</p> Signup and view all the answers

    Why do atoms normally not have an overall charge?

    <p>Because their positive and negative charges cancel each other out</p> Signup and view all the answers

    What is a conductor in relation to electric charge?

    <p>A material that permits electric charge to move freely through it</p> Signup and view all the answers

    What is Coulomb's Law related to?

    <p>The magnitude of the electric force between two point charges</p> Signup and view all the answers

    What is the electric force on a charged body exerted by?

    <p>The electric field created by other charged bodies</p> Signup and view all the answers

    What happens when electrons move away from an atom?

    <p>The atom gains or loses a charge</p> Signup and view all the answers

    What does the length of the vectors in a vector representation of an electric field indicate?

    <p>The magnitude of the field</p> Signup and view all the answers

    What does the distance between field lines in a lines-of-force representation indicate?

    <p>The magnitude of the field</p> Signup and view all the answers

    What is the direction of the force exerted by q2 on qa?

    <p>Attractive and makes an angle of 45°</p> Signup and view all the answers

    What is the net force on qa?

    <p>4.5 N</p> Signup and view all the answers

    What is the electric field at a point halfway between two point charges?

    <p>3.60 x 10^6 N/C directed to the -x-axis</p> Signup and view all the answers

    What is the force exerted on a third charge placed at the midpoint between two point charges?

    <p>Depends on the magnitude of the third charge</p> Signup and view all the answers

    What is the distance between the two point charges?

    <p>1.00 m</p> Signup and view all the answers

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