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12 / 16

  • D)

    28 W

  • E)

    6.0 W

    • 11)

      The number of protons in the nucleus of an electrically neutral atom is equal to

  • A)

    the number of neutrons in the nucleus.

  • B)

    the number of electrons surrounding the nucleus.

  • C)

    the number of electrons in the nucleus.

  • D)

    None of the other choices is correct.

Answer: B

  • 12)

    Electrical and gravitational forces follow similar equations with one main difference:

    • A)

      Electrical forces obey the inverse square law and gravitational forces do not.

    • B)

      Gravitational forces obey the inverse square law and electrical forces do not.

    • C)

      Electrical forces attract and gravitational forces repel.

    • D)

      Gravitational forces are always attractive but electrical forces can be attractive or

repulsive. Answer: D

13) The circuit below contains three 100 watt light bulbs. The emf E = 110 V. Which light bulb(s) is(are) the brightest?

  • A)

    A

  • B)

    B

  • C)

    C

  • D)

    B and C

  • E)

    All three are equally bright.

Answer: (A)

14) Which two circuits are exactly equivalent?

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