College Physics Study Set 7

Physics & Astronomy

Quiz 15 :

Electric Forces and Electric Fields

Quiz 15 :

Electric Forces and Electric Fields

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A repelling force must occur between two charged objects under which conditions?
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B

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An uncharged conductor is supported by an insulating stand.I pass a positively charged rod near the left end of the conductor, but do not touch it.The right end of the conductor will be:
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B

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When a glass rod is rubbed with silk, which of the following statements best describes what happens?
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A

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If the size of the charge value is tripled for both of two point charges maintained at a constant separation, the mutual force between them will be changed by what factor?
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About how many electrons are in 30 grams of water (H2O)?
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Who was the first to determine the electron's charge?
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Of the following substances, which one contains the highest density of free electrons?
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If body P, with a positive charge, is placed in contact with body Q (initially uncharged), what will be the nature of the charge left on Q?
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If body M, with a positive charge, is used to charge body N by induction, what will be the nature of the charge left on the latter?
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I wish to use a positively charged rod to charge a ball by induction.Which statement is correct?
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Which of the following best characterizes electrical insulators?
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Doug rubs a piece of fur on a hard rubber rod, giving the rod a negative charge.What happens?
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When charging two objects by rubbing them together:
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Two point charges are 4 cm apart.They are moved to a new separation of 2 cm.By what factor does the resulting mutual force between them change?
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Two point charges, separated by 1.5 cm, have charge values of +2.0 and -4.0 µC, respectively.What is the value of the mutual force between them? (ke = 8.99 * 109 Nm2/C2)
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The constant ke, which appears in Coulomb's law formula, is equivalent dimensionally to which of the following?
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How can a charged object attract an uncharged object made of non-conducting material?
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If the distance between two point charges is tripled, the mutual force between them will be changed by what factor?
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A metallic object holds a charge of -3.8 * 10-6 C.What total number of electrons does this represent? (e = 1.6 * 10-19 C is the magnitude of the electronic charge.)
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Which of the following best characterizes electrical conductors?
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