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Physics Chapter 24

28 Questions
Physics Quizzes & Trivia

Physics Chapter 24

Questions and Answers
  • 1. 
    The source of all magnetism is 
    • A. 

      Tiny pieces of iron

    • B. 

      Tiny domains of aligned atoms

    • C. 

      Ferromagnetic materials

    • D. 

      Moving electric charge

    • E. 

      None of these

  • 2. 
    Magnetic compasses apparently were first used by
    • A. 

      Columbus

    • B. 

      Greeks

    • C. 

      Australian aborigines

    • D. 

      Vikings

    • E. 

      Pigeons, then Chinese

  • 3. 
    Moving electric charges will interact with
    • A. 

      An electric field

    • B. 

      A magnetic field

    • C. 

      Both of these

    • D. 

      None of these

  • 4. 
    If a steady magnetic field exerts a force on a moving charge, that force is directed
    • A. 

      Opposite the direction of the motion

    • B. 

      In the direction of the motion

    • C. 

      At right angles to the direction of the motion

  • 5. 
    If a steady magnetic field exerts a force on a moving charge, that force is directed
    • A. 

      In the direction of the field

    • B. 

      Opposite the direction of the field

    • C. 

      At right angles to the direction of the field

  • 6. 
    An iron rod becomes magnetic when
    • A. 

      Positive ions accumulate at one end and negative ions at the other end

    • B. 

      It atoms are aligned having plus charges on one side and negative charges on the other

    • C. 

      The net spins of its electrons are in the same direction

    • D. 

      Its electrons stop moving and point in the same direction

    • E. 

      None of these

  • 7. 
    Like kinds of magnetic poles repel while unlike kinds of magnetic poles
    • A. 

      Attract

    • B. 

      Repel also

    • C. 

      May attract or repel

  • 8. 
    Several paper clips dangle from the north pole of a magnet. the induced pole in the bottom of the lowermost paper clip is a 
    • A. 

      North pole

    • B. 

      South pole

    • C. 

      North or south pole-no difference really

  • 9. 
    An iron nail is more strongly attracted to the 
    • A. 

      North pole of a magnet

    • B. 

      South pole of a magnet

    • C. 

      North or south pole- no difference really

  • 10. 
    Surrounding every moving electron is 
    • A. 

      A magnetic field

    • B. 

      An electric field

    • C. 

      Both of these

    • D. 

      None of these

  • 11. 
    Magnetism is due to the motion of electrons as they 
    • A. 

      Move around the nucleus

    • B. 

      Spin on their axes

    • C. 

      Both of these

    • D. 

      None of these

  • 12. 
    Magnetic domains normally occur in
    • A. 

      Iron

    • B. 

      Copper

    • C. 

      Silver

    • D. 

      All of these

    • E. 

      None of these

  • 13. 
    Magnetic field lines about a current-carrying wire
    • A. 

      Extend radially from the wire

    • B. 

      Circle the wire in closed loops

    • C. 

      Both of these

    • D. 

      Neither of these

  • 14. 
    The force on an electron moving in a magnetic field will be the largest when its direction is
    • A. 

      The same as the magnetic field direction

    • B. 

      Exactly opposite tot he magnetic field direction

    • C. 

      Perpendicular to the magnetic field direction

    • D. 

      At an angle other than 90 degrees tot eh magnetic field direction

    • E. 

      None of these

  • 15. 
    The intensity of cosmic rays bombarding the Earth's surface is largest at the 
    • A. 

      Poles

    • B. 

      Mid-latitudes

    • C. 

      Equator

  • 16. 
    If we think of the Earth as a magnet, its north (SEEKING) pole is nearest
    • A. 

      The Hudson Bay region of Canada

    • B. 

      Australia

    • C. 

      Both of these

  • 17. 
    Which pole of a compass needle points to a south pole of a magnet?
    • A. 

      North pole

    • B. 

      South pole

    • C. 

      Both of these

  • 18. 
    Pigeons navigate primarily by
    • A. 

      A good memory

    • B. 

      A keen sense of smell

    • C. 

      Magnetic sensors in their heads

    • D. 

      Ultra-high pitched sounds

    • E. 

      None of these

  • 19. 
    Magnet A has twice the magnetic field strength of Magnet B and at a certain distance pulls on magnet B with a force of 100 N. the amount of force that magnet A exerts on magnet B is
    • A. 

      At or about 50 N

    • B. 

      Exactly 100 N

    • C. 

      More information is needed

  • 20. 
    Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is
    • A. 

      Relatively small

    • B. 

      Equally huge

    • C. 

      More information is needed

  • 21. 
    An electron is hot from the right, toward a spot just between the ends of the magnet. the electron
    • A. 

      Is unaffected by the field

    • B. 

      Is attracted to one of the poles,and repelled from the other

    • C. 

      Is repelled by both poles, and therefore is turned back

    • D. 

      Is deflected into the plane of the page

    • E. 

      Accelerates straight toward the spot

  • 22. 
    • A. 

      By 180 degrees

    • B. 

      Depending on where the measurement is taken

    • C. 

      By 90 degrees

    • D. 

      Hardly at all

    • E. 

      None of these

  • 23. 
    A possible cause for the existence of the Earth's magnetic field is
    • A. 

      Moving charges in the liquid part of the Earth's core

    • B. 

      Great numbers of very slow moving charges in the Earth

    • C. 

      Convection currents in the liquid part of the Earth's core

    • D. 

      All of these

    • E. 

      None of these

  • 24. 
    Outside a magnet, magnetic field lines are conventionally drawn from
    • A. 

      North to south

    • B. 

      South to north

    • C. 

      Either way

  • 25. 
    Which force field can increase a moving electron's speed?
    • A. 

      Electric field

    • B. 

      Magnetic filed

    • C. 

      Bother of these

    • D. 

      None of these

  • 26. 
    Which force field can accelerate an electron, but never change its speed?
    • A. 

      Electric field

    • B. 

      Magnetic field

    • C. 

      Both of these

    • D. 

      None of these

  • 27. 
    When a bar magnet is broken in two as shown, each piece is 
    • A. 

      As magnetic as the original magnet

    • B. 

      Actually stronger than the original magnet

    • C. 

      At most half as strong as the original magnet

    • D. 

      No longer magnetic

  • 28. 
    Superconducting electromagnets
    • A. 

      Exist now

    • B. 

      May be possible in the near future

    • C. 

      May be possible in the distant future

    • D. 

      Are science fiction