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Physics Chapter 22

58 Questions
Physics Quizzes & Trivia

Physics Chapter 22

Questions and Answers
  • 1. 
    Which force binds atoms together to form molecules?
    • A. 

      Gravitational

    • B. 

      Nuclear

    • C. 

      Electrical

    • D. 

      Centripetal

    • E. 

      None of these

  • 2. 
    The fundamental force underlying all chemical reactions is
    • A. 

      Gravitational

    • B. 

      Nuclear

    • C. 

      Centripetal

    • D. 

      Electrical

    • E. 

      None of these

  • 3. 
    In an electrically neutral atom the number of protons in the nucleus is equal to the number of
    • A. 

      Electrons that surround the nucleus

    • B. 

      Neutrons in the nucleus

    • C. 

      Both of these

    • D. 

      Neither of these

  • 4. 
    A positive ion has more
    • A. 

      Electrons than neutrons

    • B. 

      Electrons than protons

    • C. 

      Protons than electrons

    • D. 

      Protons than neutrons

    • E. 

      Neutrons than protons

  • 5. 
    Strip electrons from an atom and the atom become a
    • A. 

      Positive ion

    • B. 

      Negative ion

    • C. 

      Different element

  • 6. 
    To say that electric charge is quantized is to say that the charge on an object
    • A. 

      May occur in an infinite variety of quantities

    • B. 

      Is a whole number multiple of the charge of one electron

    • C. 

      Will interact with neighboring electric charges

    • D. 

      Can be neither created nor destroyed

  • 7. 
    To say that electric charge is conserved is to say that electric charge
    • A. 

      May occur in an infinite variety of quantities

    • B. 

      Is a whole number multiple of the charge of one electron

    • C. 

      Will interact with neighboring electric charges

    • D. 

      Can be neither created nor destroyed

  • 8. 
    The unit of electric charge, the coulomb, is the charge on
    • A. 

      One electron

    • B. 

      A specific large number of electrons

  • 9. 
    A main difference between gravitational and electric forces is that electrical forces
    • A. 

      Attract

    • B. 

      Repel or attract

    • C. 

      Obey the inverse-square law

    • D. 

      Act over shorter distances

    • E. 

      Are weaker

  • 10. 
    The electrical force between charges is strongest when the charges are
    • A. 

      Close together

    • B. 

      Far apart

    • C. 

      The electric force is constant everywhere

  • 11. 
    The electrical force between charges depends on the
    • A. 

      Magnitude of electric charges

    • B. 

      Separation distance between electric charges

    • C. 

      Both of these

    • D. 

      None of these

  • 12. 
    A transistor is an example of
    • A. 

      A resistor

    • B. 

      A superconductor

    • C. 

      A semiconductor

    • D. 

      A dry cell

    • E. 

      Electrostatic shielding

  • 13. 
    Superconductors are noted for their
    • A. 

      High electric resistance

    • B. 

      Low electric resistance

    • C. 

      Absence of electric resistance

  • 14. 
    Rub electrons from your hair with a comb and the comb becomes
    • A. 

      Negatively charged

    • B. 

      Positively charge

  • 15. 
    An electron and a proton
    • A. 

      Attract each other

    • B. 

      Repel each other

  • 16. 
    Two protons attract each other gravitationally and repel each other electrically. By far the greater is
    • A. 

      The gravitational attraction

    • B. 

      The electrical repulsion

    • C. 

      Neither- they are the same

  • 17. 
    The primary purpose of a lightning rod is to
    • A. 

      Attract lightning and guide it to the ground

    • B. 

      Discharge the structure to which it is attached.

    • C. 

      Cancel the electric field within the structure to which it is attached

    • D. 

      Induce within the structure to which it is attached a charge opposite to that of charged clouds overhead

  • 18. 
    To say that an object is electrically polarized is to say
    • A. 

      It is electrically charged

    • B. 

      Its charges have been rearranged

    • C. 

      Its internal electric field is zero

    • D. 

      It is only partially conducting

    • E. 

      It is to some degree magnetic

  • 19. 
    A balloon will stick to a wooden wall if the balloon is charged
    • A. 

      Negatively

    • B. 

      Positively

    • C. 

      Either way

    • D. 

      Neither way

  • 20. 
    When a car is struck by lightning, the resulting electric field inside the car is
    • A. 

      Normally huge, but for brief time

    • B. 

      Normally huge for a time longer than the lightning stroke itself

    • C. 

      Small enough to be safe for an occupant inside

    • D. 

      Zero

  • 21. 
    Electric potential, measured in volts, is the ratio of electric energy to amount of electric
    • A. 

      Current

    • B. 

      Resistance

    • C. 

      Charge

    • D. 

      Voltage

    • E. 

      None of these

  • 22. 
    The electric field inside the dome of a Van de Graaff generator
    • A. 

      Depends on the amount of charge on it

    • B. 

      Depends on its size

    • C. 

      Both of these

    • D. 

      Neither of these

  • 23. 
    An uncharged pitch ball is suspended by a nylon fiber. When a negatively charged rubber rod is brought nearby, without touching it, the pitch ball
    • A. 

      Becomes charged by induction

    • B. 

      Becomes polarized

    • C. 

      Is repelled by the rod

    • D. 

      All of these

    • E. 

      None of these

  • 24. 
    The net charge on a charged capacitor
    • A. 

      Depends on the area of the capacitor plates

    • B. 

      Depends on the distance between the capacitor plates

    • C. 

      Depends on the medium between the capacitor plates

    • D. 

      All of these

    • E. 

      None of these- the net charge is zero

  • 25. 
    Charges on the plates of a charged capacitor reside on the surfaces
    • A. 

      Between the capacitor plates

    • B. 

      Exterior to the capacitor

  • 26. 
    When the distance between two charges is halved, the electrical force between the charges
    • A. 

      Quadruples

    • B. 

      Doubles

    • C. 

      Halves

    • D. 

      Is reduced by 1/4

    • E. 

      None of these

  • 27. 
    Particle A and particle B interact with each other. Particle A has twice the charge of particle B. Compared to the force on Particle A, the force on Particle B is
    • A. 

      Four times as much

    • B. 

      Two times as much

    • C. 

      The same

    • D. 

      Half as much

    • E. 

      None of these

  • 28. 
    If you comb your hair and the comb becomes positively charged, then your hair becomes
    • A. 

      Positively charged

    • B. 

      Negatively charged

    • C. 

      Uncharged

  • 29. 
    To say that electric charge is conserved means that no case has ever been found where
    • A. 

      The total charge on an object has changed

    • B. 

      The net amount of negative charge on an object is unbalanced by a positive charge on another object

    • C. 

      The total amount of charge on an object has increased

    • D. 

      Net charge has been created or destroyed

    • E. 

      None of these

  • 30. 
    A difference between electric forces and gravitational forces is that electrical forces include
    • A. 

      Separation distance

    • B. 

      Repulsive interactions

    • C. 

      The inverse square law

    • D. 

      Infinite range

    • E. 

      None of these

  • 31. 
    A conductor differs from an insulator in that a conductor
    • A. 

      Has more electrons than protons

    • B. 

      Has more protons than electrons

    • C. 

      Has more energy than an insulator

    • D. 

      Has faster moving molecules

    • E. 

      None of these

  • 32. 
    • A. 

      Positively charged

    • B. 

      Negatively charged

    • C. 

      Uncharged

    • D. 

      Charged the same as it was

  • 33. 
    Every proton in the universe is surrounded by its own
    • A. 

      Electric field

    • B. 

      Gravitational field

    • C. 

      Both of these

    • D. 

      Non of these

  • 34. 
    The direction of an electric field is the direction of the force that it would exert on
    • A. 

      A neutron

    • B. 

      An electron

    • C. 

      An atom

    • D. 

      A proton

    • E. 

      A molecule

  • 35. 
    The electric field around an isolated electron has a certain strength 1 cm from the electron. the electric field strength 2 cm from the electron is
    • A. 

      Half as much

    • B. 

      The same

    • C. 

      Twice as much

    • D. 

      Four times as much

    • E. 

      None of these

  • 36. 
    If you use 10 J of work to push a coulomb of charge into an electric field, its voltage with respect to its starting position is
    • A. 

      Less than 10 V

    • B. 

      10 V

    • C. 

      More then 10 V

  • 37. 
    If you use 10 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, its kinetic energy is
    • A. 

      Less than 10 J

    • B. 

      10 J

    • C. 

      More than 10 J

  • 38. 
    An electroscope is charged positively as shown by foil leaves that stand apart. as a negative charge is brought close tot he electroscope, the leaves
    • A. 

      Fall closer together

    • B. 

      Spread apart further

    • C. 

      Do not move

  • 39. 
    Charge carriers in a metal are electrons rather than protons because electrons are
    • A. 

      Negative

    • B. 

      Smaller

    • C. 

      Loosely bound

    • D. 

      All of these

    • E. 

      None of these

  • 40. 
    To be safe in the unlikely case of a lightning strike, it is best to be inside a building framed with
    • A. 

      Steel

    • B. 

      Wood

    • C. 

      Both the same

  • 41. 
    A charged balloon neatly illustrates that something can have a great amount of
    • A. 

      Potential energy and a low voltage

    • B. 

      Voltage and a small potential energy

    • C. 

      Both voltage and potential energy

    • D. 

      None of these

  • 42. 
    Normally a balloon charged to several thousand volts has a relatively small amount of
    • A. 

      Charge

    • B. 

      Energy

    • C. 

      Both

    • D. 

      Neither

  • 43. 
    You can touch a 100,000- volt Van de Graaff generator with little harm because although the voltage is high, the relatively small amount of charge means there is a relatively small amount of
    • A. 

      Energy

    • B. 

      Electric field

    • C. 

      Polarization

    • D. 

      Conduction

  • 44. 
    Two charges separated by one meter exert 1-N forces on each other if the charges are pulled to 3-m separation distance, the force on each charge will be
    • A. 

      1 N

    • B. 

      2 N

    • C. 

      4 N

    • D. 

      8 N

    • E. 

      16 N

  • 45. 
    Two charges separated by one meter exert 1-N forces on each other. If the charges are pulled to 3-m separation distance, the force on each charge will be
    • A. 

      0.33 N

    • B. 

      0.11 N

    • C. 

      0 N

    • D. 

      3 N

    • E. 

      9 N

  • 46. 
    Two charges separated by one meter exert 1-N forces on each other. If the magnitude of each charge is doubled, the force on each charge is
    • A. 

      1 N

    • B. 

      2 N

    • C. 

      4 N

    • D. 

      8 N

    • E. 

      None of these

  • 47. 
    The electrical force on a 2-C charge is 60 N. What is the value of the electric field at the place where the charge is located?
    • A. 

      20 N/C

    • B. 

      30 N/C

    • C. 

      60 N/C

    • D. 

      120 N/C

    • E. 

      240 N/C

  • 48. 
    Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be
    • A. 

      F

    • B. 

      2F

    • C. 

      F/2

    • D. 

      F/4

    • E. 

      None of these

  • 49. 
    Two charged particles attract each other with a force F. If the charges of both particles are dubled, and the distance between them also doubled, then the force of attraction will be
    • A. 

      F

    • B. 

      2 F

    • C. 

      F/2

    • D. 

      F/4

    • E. 

      None of these

  • 50. 
    When a single charge q is placed on one corner of a square, the electric field at the center of the square is F/q. If three other equal charges are placed on the other corners, the electric field at the center of the square due to these four equal charges is
    • A. 

      F/q

    • B. 

      4F/q

    • C. 

      F/(2q)

    • D. 

      F/(4q)

    • E. 

      None of these

  • 51. 
    When a single charge q is placed at one corner of a square, the electric field at the center of the square is F/q. If two other equal charges are placed at the adjacent corners of the square, the electric field at the center of the square due to these three equal charges is
    • A. 

      F/q

    • B. 

      4F/q

    • C. 

      F/(2q)

    • D. 

      F(4q)

    • E. 

      None of these

  • 52. 
    An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is
    • A. 

      0.25 V

    • B. 

      0.5 V

    • C. 

      1 V

    • D. 

      2 V

    • E. 

      4 V

  • 53. 
    The electric field inside an uncharged metal ball is zero. If the ball is negatively charged, the electric field inside the ball is then 
    • A. 

      Less than zero.

    • B. 

      Zero.

    • C. 

      Greater than zero.

  • 54. 
    Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have 
    • A. 

      The same sign

    • B. 

      Opposite signs

    • C. 

      Not enough information given

  • 55. 
    Two charged particles held close to each other are released. As the particles move, the velocity of each increases. Therefore, their charges have 
    • A. 

      The same sign

    • B. 

      Opposite signs

    • C. 

      Not enough information given

  • 56. 
    A positive charge and a negative charge held near each other are released.  As they move, the force on each particle
    • A. 

      Increases

    • B. 

      Decreases

    • C. 

      Stays the same

  • 57. 
    Two charged particles held near each other are released. As they move, the acceleration of each decreases.  Therefore, the particles have
    • A. 

      The same sign

    • B. 

      Opposite signs

    • C. 

      Not enough information given

  • 58. 
    A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?
    • A. 

      Electron

    • B. 

      Proton

    • C. 

      Both accelerate equally

    • D. 

      Neither accelerates