Physics ch.22
An electron and a proton...
Attract each other
The primary purpose of a lightning rod is to...
Discharge the structure to which it is attached
Strip electrons from an atom and it becomes a...
Positive ion
When two neutral materials are rubbed together, is is a transfer of electric charge. The total electrical charge for the system...
Remains constant as electrons are transferred
As an electron moves between two charged parallel plates, the force of the electric field in the electron...
Remains the same
When hair is combed with a hard rubber comb, the hair becomes positively charged because the comb...
Removes electrons from the hair
A transistor is an example of a...
Semiconductor
The electric field inside the dome of a Van de Graaff generator is...
Zero
A metal sphere with an excess of 11 electrons touches an identical metal sphere with an excess of 15 electrons. After they touch, the number of electrons on the second sphere is...
13
If 8 joules of work is required to transfer 4 coulombs of charge between two points, then the potential difference between the two points is...
2 Volts (V=J/C)
A coulomb of charge that passes through a 6-volt battery is given...
6 joules (1 volt=1 joule/coulomb)
A large number of electrons move freely throughout a solid material. This material is best classified as...
A conductor
Electrons are made to flow in a wire when there is...
A potential difference across its ends
The unit of electric charge, the coulomb, is the charge on...
A specific large number of electrons (6.25 billion billion)
Which device is used for amplifying the flow of electrons in a solid star circuit?
A transistor
To say that electric charge is conserved is to say that electric charge...
Can neither be created nor destroyed
A main difference between gravitational and electrical forces is that electrical forces...
Can repel OR attract
Tu electrical forces between charges is strongest when the charges are...
Close together
An ampere is a unit of electrical...
Current
The distance between two point charges is tripled. The new electrostatic force between the charges is...
Decreased to one-ninth
A negatively charged object is brought near the knob of a negatively charges electroscope. The leaves of the electroscope will...
Move closer together
v-knob O === | | / \ -leaves A positively charged rod is held near a neutral electroscope. The charge on the knob becomes...
Negative and the leaves become positive
Neutral atoms always have the same numbers of...
Protons and electrons
A positive ion has more...
Protons than electrons
When a car is truck by lighting, the resulting electric charge inside the car is...
Zero
Electric potential, measured in volts, is the ratio of electric energy to amount of...
Electric charge (1 volt= 1 joule/coulomb)
The fundamental force underlying all chemical reactions is...
Electrical force
Which force binds atoms together to form molecules?
Electrical force
Two protons attract each other gravitationally and repel each other electrically. By far the greater force is the...
Electrical repulsion
In an electrically neutral atom the number of protons in the nucleus is equal to the number of...
Electrons surrounding the nucleus
To say that electric charge is quantized is to say that the charge on and object...
Is a whole-Number multiple of the charge of one electron
++++ •a •b •c ------ What is the intensity of the electric field relative to locations a, b, and c?
It is the same at all locations
To say that a n object is electrically polarized is to say...
It's charges have been rearranged
The electrical force between charges depends only on the charges...
Magnitude and separation distance
A body will maintain a constant negative electrostatic charge of the body...
Maintains the same excess of electrons
Superconductors are noted for their...
Absence of electric resistance
