physics review chapter 6

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.

charged rod, neutral sphere, negative

A neutral metal sphere is touched by a negatively-charged metal rod. As a result, the sphere will become charged by ____.

conduction

A neutral, aluminum pie plate is held by its insulating handle and touched to a positively charged Van de Graaff generator. The pie plate becomes charged by the method of _____.

conduction

Charging by __________ occurs when objects touch and an electric charge is transferred from one object to the other.

conduction

You walk across a carpet and experience a shock when you touch a metal doorknob. What type of charging method is this an example of?

conduction

A piece of copper is a good _____

conductor

Any metal is a good _____of electric current because the electrons in the outer atomic shell of its atoms are "loose."

conductor

It is easy to establish an electric current in metals because one (or more) of the ______ in the outer shell of the atoms in a metal is not anchored to the nuclei of particular atoms but is free to wander in the material.

electrons

The _____ in rubber and glass are tightly bound and belong to particular atoms.

electrons

Whether a substance is classified as a conductor or insulator depends on how tightly the atoms of the substance hold their _____

electrons

A glass test tube is rubbed with a plastic bag. The glass test tube becomes charged with a positive type of charge. During the rubbing process, _____ .

electrons are removed from the glass test tube and transferred to the plastic bag

When an object is charged by induction, the charging object and the electroscope end up with (identical / opposite) charges.

identical

A foam square is charged by rubbing it with animal fur. A neutral aluminum pie plate is then held above the foam square. The pie plate is touched by a finger and subsequently becomes charged. The aluminum pie plate has become charged by the method of _____.

induction

A negatively-charged balloon is brought near a neutral conducting sphere. While the balloon is near, the sphere is touched (grounded). The ground is removed, while the balloon is still near. The sphere is being charged by the method of ____.

induction

You notice the build-up of dust on a computer screen when it is on. What is the method of charging that caused this?

induction

A piece of wood is a good _______

insulator

All substances can be arranged in order of their ability to conduct electric charge. Those at the top of the list are conductors and those at the bottom are _______

insulators

A neutral, aluminum pie plate is held by its insulating handle and touched to a positively charged Van de Graaff generator. The aluminum pie plate becomes charge ______. During the charging process electrons move from _____ to the _____.

positively, aluminum pie plate, Van de Graaff generator

A material that can be made to behave sometimes as an insulator and sometimes as a conductor is called a ______

semiconductor

Some materials, such as germanium and ______, are neither good conductors nor good insulators.

silicon

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 ______.

the opposite of the type of charge on the balloon

Charging by _______ occurs when objects are charged without touching.

induction

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 ______.

electrons pass from the sphere to the person (ground)

A device that can detect the presence of charge is an _____

electroscope

A negatively charged balloon is brought near a neutral, conducting sphere. The opposite side of the conducting sphere is touched. When touched, electrons move _____.

from the sphere to the hand

When an object is charged by conduction, the charging object and the electroscope end up with (identical / opposite) charges.

identical

If a negatively charged rod is brought up close to and then removed, a neutral electroscope will become (positive)(negative)(neutral).

neutral

When an object is charged by polarization, the leaves and the knob of the electroscope end up with (identical / opposite) charges.

opposite

A negatively-charged balloon is brought near a neutral conducting sphere. While the balloon is near, the sphere is touched (grounded). At this point, there is a movement of electrons. Electrons move _______ .

out of the sphere into the ground (hand)