Physics: Practice Questions On Electric Currents And Force!

23 Questions | Total Attempts: 69

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Physics: Practice Questions On Electric Currents And Force! - Quiz

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Questions and Answers
  • 1. 
    Ohm's law states that the current flowing through a piece of metal is proportional to the potential differnce across it, if ...
    • A. 

      Resistance is constant

    • B. 

      Pressure is constant

    • C. 

      Cross-sectional area is constant

    • D. 

      Temperature is constant

  • 2. 
    "A current that flows in just one direction is known as a [...]"
  • 3. 
    One [...] of negative charge is the chrage carried by a total of 6.25 * 10^18 electrons
  • 4. 
    A current that constantly changes direction is known as
    • A. 

      Changing current

    • B. 

      Variable current

    • C. 

      Variable resistor

    • D. 

      Alternating current

  • 5. 
    A conventional current flows from ...
    • A. 

      Positive to negative

    • B. 

      Negative to positive

  • 6. 
    The potential difference between two points is the energy difference per unit distance moved.
    • A. 

      True

    • B. 

      False

  • 7. 
    The speed of electrons due to the current is called their [...] velocity
  • 8. 
    A device with constant resistance is known as a(n) ...
  • 9. 
    The rate of flow of eletrical charge is the definition of ...
    • A. 

      Wave

    • B. 

      Ray

    • C. 

      Circuit

    • D. 

      Current

  • 10. 
    So, current is the name for moving charges, and the path they follow is called the [...]
  • 11. 
    A perfect ammeter has infinite resistance
    • A. 

      True

    • B. 

      False

  • 12. 
    The total energy difference per unit charge around a circuit is called the
    • A. 

      Internal energy

    • B. 

      Electromotive force (e.m.f.)

    • C. 

      Internal resistance

    • D. 

      Drawn

  • 13. 
    In a series circuit, the charges are allowed more than one possible route around the circuit
    • A. 

      True

    • B. 

      False

  • 14. 
    A variable potential divider (when two resistors "divide up" the potential difference of the battery) is known as a(n)
  • 15. 
    A resistor whose value of resistance depends on its temperature is known as a(n)
    • A. 

      Light dependent resistor

    • B. 

      Strain gauge

    • C. 

      Thermistor

    • D. 

      Negative temperature coefficient (NTC)

  • 16. 
    What is a strain gauge?
    • A. 

      A device whose resistance depends on the amount of light shining through its surface

    • B. 

      A device whoe output voltage depnds on any extension or compression resulting from a change of length

    • C. 

      A device whose value of resistance depends on its temperature

    • D. 

      A circuit which has an output potential difference that depends on an external factor

  • 17. 
    "Every mass in the Universe attracts all other masses in the Universe" This is the fundamental statement of Newton's theory of [...]
  • 18. 
    Matter that contains no charge, or equal amounts of positive and negative charge, is said to be electrically [...]
  • 19. 
    What is a conductor?
    • A. 

      A material that allows the flow of charge through it

    • B. 

      A material through which a charge cannot flow

    • C. 

      A material with infinite internal resistance

    • D. 

      The point charge within an electric field

  • 20. 
    The force that exists between all charges is known as the ...
  • 21. 
    Electric field is the force per unit charge on a negative test charge
    • A. 

      True

    • B. 

      False

  • 22. 
    The lines of a magnetic field are also called ...
    • A. 

      Magnetic lines

    • B. 

      Field lines

    • C. 

      Flux lines

    • D. 

      Magnelines

  • 23. 
    "When a current-carrying wire is placed in a magnetic field, the magnetic interaction between the two results in a force" What is being defined?
    • A. 

      Electrostatic effect

    • B. 

      Magnetic effect

    • C. 

      Motor effect

    • D. 

      Electric effect

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