Electrostatics

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2

____ are the charged parts of an atom. Select one or more: a. Electrons b. Neutrons c. Protons

a. Electrons c. Protons

A metal sphere is electrically neutral. It is touched by a positively-charged metal rod. As a result, the metal sphere becomes charged positively. Which of the following occur during the process? Select one or more: a. Electrons are transferred from the sphere to the rod. b. Positive electrons are moved between the two objects. c. The overall charge of the system is conserved. d. The metal sphere gains some protons. e. Protons are transferred from the rod to the sphere. f. The metal sphere loses electrons.

a. Electrons are transferred from the sphere to the rod. c. The overall charge of the system is conserved. f. The metal sphere loses electrons.

____ are positively charged. Select one or more: a. Protons b. Neutrons c. Electrons

a. Protons

The electrical force between two objects depends on the ___ and ___ the objects. Select one: a. charge on; distance between b. mass of; distance between c. mass of; charge on d. mass of; size of e. charge on; size o

a. charge on; distance between

A neutral metal sphere is touched by a negatively-charged metal rod. During the process, electrons are transferred from the _____ to the _____ and the sphere acquires a _____ charge. Select one: a. charged rod, neutral sphere, negative b. ... nonsense! None of these describe what occurs. c. neutral sphere, charged rod, positive d. charged rod, neutral sphere, positive e. neutral sphere, charged rod, negative

a. charged rod, neutral sphere, negative

Substances through which charges move easily are called ____. Select one: a. conductors b. engineers c. insulators d. electators

a. conductors

What is the unit of charge? Select one: a. coulomb b. joule c. watt d. ampere e. volt

a. coulomb

A neutral object can become negatively-charged by _______. Select one: a. gaining electrons b. losing electrons c. losing neutrons d. gaining neutrons e. losing protons f. gaining protons

a. gaining electrons

Material X and material Y are rubbed together. As a result, material Y acquires a positive charge. This means that ______. Select one: a. material X has the greater affinity for electrons b. material Y more easily creates electrons than X c. material Y just got plain lucky d. material X is the conductor and Y the insulator e. material Y has the greater affinity for electrons f. material X is the insulator and Y the conductor

a. material X has the greater affinity for electrons

Two balloons, X and Y are placed near each other and subsequently repel each other. If balloon X is negatively charged, then Y MUST be ___. Select one: a. negatively-charged b. positively-charged c. either positively or negatively-charged d. neutra

a. negatively-charged

Two balloons, X and Y are placed near each other and subsequently attract each other. If balloon X is positively charged, then Y MUST NOT be ___. Select one or more: a. positively-charged b. neutral c. negatively-charged

a. positively-charged

____ are found outside the nucleus of an atom. Select one or more: a. Neutrons b. Electrons c. Protons

b. Electrons

A plastic golf tube is rubbed by bunny fur and electrons are transferred from the fur to the tube. As a result, the plastic golf tube acquires ____. Select one: a. a lot of mass b. a negative charge c. negative mass d. a positive charge e. no charge

b. a negative charge

A physics student, standing on the ground, touches an uncharged plastic baseball bat to a negatively charged electroscope. This will cause ____. Select one: a. the baseball bat to acquire an excess of protons b. absolutely nothing (or very little) to happen since the plastic bat does not conduct c. the electroscope to be grounded as electrons flow out of the electroscope d. the electroscope to be grounded as protons flow out of the electroscope e. the electroscope to be grounded as electrons flow into the electroscope f. the electroscope to be grounded as protons flow into the electroscope

b. absolutely nothing (or very little) to happen since the plastic bat does not conduct

Material X and material Y are rubbed together. As a result, material X acquires a positive charge. This means that ______. Select one: a. material X just got plain lucky b. material Y has the greater affinity for electrons c. material X is the conductor and Y the insulator d. material X is the insulator and Y the conductor e. material X has the greater affinity for electrons f. material X more easily creates electrons than Y

b. material Y has the greater affinity for electrons

Two balloons, X and Y are placed near each other and subsequently repel each other. If balloon X is positively charged, then Y MUST NOT be ___. Select one or more: a. positively-charged b. neutral c. negatively-charged

b. neutral c. negatively-charged

Two neutral objects - object A and object B - are rubbed together. During the process, electrons are transferred from object A to object B. This would cause object A to acquire a _____ charge and object B to acquire a _____ charge. Select one: a. positive, positive b. positive, negative c. neutral, negative d. negative, neutral e. negative, negative f. positive, neutral g. neutral, positive h. negative, positive i. neutral, neutral

b. positive, negative

A rubber balloon is rubbed on a wool sweater. In the process, electrons are transferred from the wool sweater to the rubber balloon. As a result the balloon acquires ____. Select one: a. no charge b. a lot of mass c. a negative charge d. negative mass e. a positive charge

c. a negative charge

A rubber balloon is rubbed on a wool sweater. In the process, electrons are transferred from the wool sweater to the rubber balloon. As a result the sweater acquires ____. Select one: a. a negative charge b. no charge c. a positive charge d. negative mass e. a lot of mass

c. a positive charge

Which of the following would cause the electrical force between two objects to increase? Select one or more: a. increase the mass of one object b. increase the mass of both objects c. decrease the distance between the objects' centers d. increase the distance between the objects' centers e. increase the charge on both objects f. increase the charge on one object

c. decrease the distance between the objects' centers d. increase the distance between the objects' centers

Material Y has a greater electron affinity than material X. When two neutral samples of these materials are rubbed together, _______. Select one or more: a. electrons are created and deposited upon Y b. protons are transferred from X to Y c. electrons are transferred from X to Y d. electrons are transferred from Y to X e. protons are transferred from Y to X f. electrons are created and deposited upon X

c. electrons are transferred from X to Y

Material X has a greater electron affinity than material Y. When two neutral samples of these materials are rubbed together, _______. Select one or more: a. electrons are transferred from X to Y b. protons are transferred from X to Y c. electrons are transferred from Y to X d. electrons are created and deposited upon X e. protons are transferred from Y to X f. electrons are created and deposited up

c. electrons are transferred from Y to X

The best explanation for how a positively-charged object can become grounded is that the object ______. Select one: a. loses protons to another object b. gains protons from another object c. gains electrons from another object d. loses electrons to another object

c. gains electrons from another object

A charged metal sphere is touched by a person standing on the ground. The metal sphere subsequently becomes neutral. This process is known as _____. Select one: a. polarization b. frictional charging c. grounding d. charging by conduction e. induction f. oxidation g. reduction

c. grounding

Two neutral objects - object A and object B - are rubbed together. During the process, object A becomes charged negatively and object B becomes charged positively. This is because ______. Select one: a. object A loses electrons and object B loses protons b. object A gains protons and object B gains electrons c. object A gains electrons and object B loses electrons d. object A loses electrons and object B gains electrons e. object A loses protons and object B gains protons f. object A loses protons and object B loses electrons g. object A gains electrons and object B gains protons

c. object A gains electrons and object B loses electrons

A negatively-charged metal sphere is touched by a person standing on the ground. The metal sphere subsequently becomes neutral. The metal sphere becomes neutral during this process because ______. Select one: a. electrons pass from the person (ground) to the sphere b. protons pass from the person (ground) to the sphere c. electrons pass from the sphere to the person (ground) d. protons pass from the sphere to the person (ground)

c.electrons pass from the sphere to the person (ground)

A neutral metal sphere is touched by a positively-charged metal rod. During the process, protons are transferred from the _____ to the _____ and the sphere acquires a _____ charge. Select one: a. charged rod, neutral sphere, negative b. neutral sphere, charged rod, positive c. neutral sphere, charged rod, negative d. ... nonsense! None of these describe what occurs. e. charged rod, neutral sphere, positive

d. ... nonsense! None of these describe what occurs.

A plastic golf tube is rubbed by bunny fur and electrons are transferred from the fur to the tube. As a result, the bunny fur acquires ____. Select one: a. a negative charge b. negative mass c. a lot of mass d. a positive charge e. no charge

d. a positive charge

A neutral metal sphere is touched by a negatively-charged metal rod. As a result, the sphere will become charged by ____. Select one: a. reduction b. friction c. induction d. conduction e. oxidation f. deduction

d. conduction

A plastic golf tube is rubbed by bunny fur and electrons are transferred from the fur to the tube. This means that the _____. Select one: a. fur has the greater affinity for electrons b. golf tube just got plain lucky c. golf tube is the insulator and the fur is the conductor d. golf tube has the greater affinity for electrons e. golf tube is the conductor and the fur is the insulator f. golf tube more easily creates electrons than Y

d. golf tube has the greater affinity for electrons

Substances through which charges have difficulty moving are called ____. Select one: a. electators b. engineers c. conductors d. insulators

d. insulators

Material X and material Y are rubbed together. As a result, material X acquires a negative charge. This means that ______. Select one: a. material X more easily creates electrons than Y b. material X is the conductor and Y the insulator c. material X is the insulator and Y the conductor d. material X has the greater affinity for electrons e. material Y has the greater affinity for electrons f. material X just got plain lucky

d. material X has the greater affinity for electrons

An atom that is negatively-charged contains ____. Select one: a. more protons than electrons b. neutrons only c. electrons only d. more electrons than protons e. protons only f. more electrons than neutrons g. more protons than neutrons

d. more electrons than protons

Material X has a greater electron affinity than material Y. When two neutral samples of these materials are rubbed together, X acquires a ____ charge and Y acquires a ____ charge. Select one: a. negative, neutral b. positive, positive c. neutral, negative d. negative, positive e. negative, negative f. positive, negative

d. negative, positive

Two neutral objects - object A and object B - are rubbed together. During the process, object A becomes charged positively and object B becomes charged negatively. This is because ______. Select one: a. object A gains electrons and object B gains protons b. object A loses protons and object B gains protons c. object A gains electrons and object B loses electrons d. object A loses electrons and object B gains electrons e. object A gains protons and object B gains electrons f. object A loses electrons and object B loses protons g. object A loses protons and object B loses electrons

d. object A loses electrons and object B gains electrons

Suppose that a charged balloon is used to charge a neutral object by the method of induction. One can be sure that the charge that the neutral object would acquire is ______ Select one: a. ... nonsense! You can't be sure of anything in this world. b. the same as the type of charge on the balloon c. not at all dependent upon the type of charge on the balloon d. the opposite of the type of charge on the balloon

d. the opposite of the type of charge on the balloon

Suppose that a charged balloon is used to charge a neutral object by the method of induction. One can be sure that the charge that the neutral object would acquire is ______ Select one: a. the same as the type of charge on the balloon b. not at all dependent upon the type of charge on the balloon c. ... nonsense! You can't be sure of anything in this world. d. the opposite of the type of charge on the balloon

d. the opposite of the type of charge on the balloon

A positively-charged Van de Graaff generator is touched by a daring student. A spark of lightning is seen as _______. Select one: a. protons flow from the student towards the Van de Graaff generator b. protons flow from the Van de Graaff generator towards the student c. electrons flow from the Van de Graaff generator towards the student d. the daring student breathes her last breath e. electrons flow from the student towards the Van de Graaff generator

e. electrons flow from the student towards the Van de Graaff generator

Doubling the distance between two charged objects will cause the electrical force between them to be ___ the initial force. Select one: a. three times b. twice c. four times d. one-half e. one-fourth f. the same as g. one-third

e. one-fourth

Material X has a lower electron affinity than material Y. When two neutral samples of these materials are rubbed together, X acquires a ____ charge and Y acquires a ____ charge. Select one: a. neutral, negative b. negative, positive c. negative, neutral d. negative, negative e. positive, negative f. positive, positive

e. positive, negative

A rubber balloon is rubbed on a wool sweater. In the process, electrons are transferred from the wool sweater to the rubber balloon. This means that the _____. Select one: a. rubber balloon more easily creates electrons than Y b. rubber balloon is the insulator and the wool sweater is the conductor c. wool sweater has the greater affinity for electrons d. rubber balloon just got plain lucky e. rubber balloon has the greater affinity for electrons f. rubber balloon is the conductor and the wool sweater is the insulator

e. rubber balloon has the greater affinity for electrons

Two neutral objects - object A and object B - are rubbed together. During the process, object A becomes charged positively and object B becomes charged negatively. This is because ______. Select one: a. protons are transferred from object A to object B b. protons are transferred from object B to object A c. electrons are transferred from object B to object A d. object A exchanges a proton for one of object B's electrons e. object A exchanges an electron for one of object B's protons f. electrons are transferred from object A to object B

f. electrons are transferred from object A to object B

Two neutral objects - object A and object B - are rubbed together. During the process, object A becomes charged negatively and object B becomes charged positively. This is because ______. Select one: a. object A exchanges a proton for one of object B's electrons b. protons are transferred from object B to object A c. electrons are transferred from object A to object B d. object A exchanges an electron for one of object B's protons e. protons are transferred from object A to object B f. electrons are transferred from object B to object A

f. electrons are transferred from object B to object A

A positively-charged metal sphere is touched by a person standing on the ground. The metal sphere subsequently becomes neutral. The metal sphere becomes neutral during this process because ______. Select one: a. protons pass from the person (ground) to the sphere b. protons pass from the sphere to the person (ground) c. positive electrons pass from the person (ground) to the sphere d. positive electrons pass from the sphere to the person (ground) e. electrons pass from the sphere to the person (ground) f. electrons pass from the person (ground) to the sphere

f. electrons pass from the person (ground) to the sphere

A metal sphere is electrically neutral. It is touched by a positively-charged metal rod. As a result, the metal sphere becomes charged positively. This occurs because the metal sphere _____. Select one: a. gained protons from the rod b. ... nonsense. The metal sphere would acquire a negative charge. c. lost protons to the rod d. gained negative electrons from the rod e. gained positive electrons from the rod f. lost electrons to the rod g. lost negative protons to the rod

f. lost electrons to the rod

In typical electrostatic experiments, protons cannot be gained or lost from an atom because they are _____. Select one: a. loosely bound outside the atom's nucleus b. less massive than electrons c. negatively charged d. ... nonsense! Protons could be gained or lost from any atom. e. positively charged f. tightly bound in the atom's nucleus g. more massive than electrons

f. tightly bound in the atom's nucleus

In typical electrostatic experiments, protons cannot be gained or lost from an atom because they are _____. Select one: a. negatively charged b. positively charged c. more massive than electrons d. less massive than electrons e. loosely bound outside the atom's nucleus f. ... nonsense! Protons could be gained or lost from any atom. g. tightly bound in the atom's nucleus

g. tightly bound in the atom's nucleus

In typical electrostatic experiments, protons cannot be gained or lost from an atom because they are _____. Select one: a. positively charged b. less massive than electrons c. more massive than electrons d. ... nonsense! Protons could be gained or lost from any atom. e. negatively charged f. loosely bound outside the atom's nucleus g. tightly bound in the atom's nucleus

g. tightly bound in the atom's nucleus

An object is considered to be neutral when ____. Select one: a. the object contains the same number of neutrons as electrons b. the object contains no protons c. there are no charges in the object d. the object contains no neutrons e. the object contains no charges f. the object contains no electrons g. the object contains the same number of protons as neutrons h. the object contains the same number of electrons as protons

h. the object contains the same number of electrons as protons