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Chapter 15 Copyright Cengage Learning. Powered by Cognero. Page 1 1.Doug rubs a piece of fur on a hard rubber rod, giving the rod a negative charge. What happens?

• Protons are removed from the rod.
• Electrons are added to the rod.
• The fur is also charged negatively.
• The fur is left neutral.

ANSWER: b

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

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

• Charges are of unlike signs.
• Charges are of like signs.
• Charges are of equal magnitude.
• Charges are of unequal magnitude.

ANSWER: b

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

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

• Electrons are removed from the rod.
• Protons are removed from the silk.
• The silk is charged positively.
• The silk remains neutral.

ANSWER: a

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

4.When charging two objects by rubbing them together

• Neither may be a conductor.

College Physics 11e (Volume 2) Raymond Serway Chris Vuille (Test Bank Chapter 15-30, 100% Original Verified, A+ Grade) 1 / 4

Chapter 15

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• They must be made of different material.
• They will sometimes end up with both being positively charged.
• The heat produced by friction is a necessary part of this process.

ANSWER: b

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 8/14/2016 12:06 AM

• Who was the first to determine the electron’s charge?
• Franklin
• Coulomb
• Millikan
• Faraday

ANSWER: c

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• 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

• negative.
• positive.
• neutral.
• attracted.

ANSWER: b

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 8/14/2016 12:06 AM

• Of the following substances, which one contains the highest density of free electrons?
• hard rubber
• iron 2 / 4

Chapter 15

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• amber
• glass

ANSWER: b

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• Which of the following best characterizes electrical conductors?
• low mass density
• high tensile strength
• electric charges move freely
• poor heat conductors

ANSWER: c

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• Which of the following best characterizes electrical insulators?
• charges on the surface don’t move
• high tensile strength
• electric charges move freely
• good heat conductors

ANSWER: a

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• 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?

• must be equal in magnitude to that on P
• must be negative
• must be positive 3 / 4

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• must be greater in magnitude than that on P

ANSWER: c

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• I wish to use a positively charged rod to charge a ball by induction. Which statement is correct?
• The charge on the ball will be positive.
• The ball must be a conductor.
• The ball must be an insulator that is connected temporarily to the ground.
• The ball is charged as the area of contact between the two increases.

ANSWER: b

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• How can a charged object attract an uncharged object made of non-conducting material?
• The uncharged object must somehow gain a like charge.
• The uncharged object must somehow gain an unlike charge.
• The charges in the uncharged object can become polarized.
• Attraction of an insulator is not possible.

ANSWER: c

POINTS: 1

DIFFICULTY: 1

QUESTION TYPE: Multiple Choice

HAS VARIABLES: False

TOPICS: 15.1 Electric Charges, Insulators, and Conductors

DATE CREATED: 7/6/2016 4:59 PM

DATE MODIFIED: 7/6/2016 4:59 PM

• Two small objects are suspended from threads. When the objects are moved close together, they attract one another.

Which of the following could produce this result?

• One object is positively charged and the other is negatively charge.
• One object is positively charged and the other is uncharged.
• One object is negatively charged and the other is uncharged.
• All of the above could result in such attraction.
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