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| Electricity at rest is called ___________. |
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Definition
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Term
| From where do electrical forces arise? |
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Definition
| Particles in atoms electrons (-), protons (+) and neutrons (0) |
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Term
| State the concept of conservation of charge. |
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Definition
| Net electric charge is neither created nor destroyed, but is transferred from one material into another |
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Term
| The unit of charge is the _____________. |
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Definition
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Term
| Write Coulomb's law and tell me what the symbols stand for. |
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Definition
| F = K q1q2/d2 k – proportionality constant q1 – charge of particle one q2 – charge of particle two d – distance between the particles |
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Term
| What makes a good insulator? |
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Definition
| The electrons are tightly bound and remain with an atom. |
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Term
| Materials that can be made to behave sometimes as insulators and sometimes as conductors are called ________________. |
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Definition
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Term
| Metals that have infinite conductivity (zero resistance to the flow of charge) are called what? |
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Definition
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Term
| Name the term applied to electric charge that has been redistributed on an object because of the presence of a charged object nearby. |
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Definition
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Term
| The charging of an object without direct contact is ___________________. |
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Definition
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Term
| What is the term applied to an atom or molecule in which the charges are aligned so that one side is slightly more positive or negative that the opposite side? |
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Definition
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Term
| All electrons have the same amount of ____________________ charge |
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Definition
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Term
| A proton has a ___________ charge that is equal in magnitude to the negative charge of the ______________. |
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Definition
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Term
| Do like charges repel or attract? |
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Definition
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Term
| Do unlike charges repel or attract? |
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Definition
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Term
| _______________ move easily in good conductors |
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Definition
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Term
| T/F Electrons do move easily in good insulators. |
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Definition
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Term
| How do objects become charged? |
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Definition
| When electrons move onto them or off of them |
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Term
| Charging by friction occurs when electrons are transferred by ___________. |
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Definition
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Term
| Charging by contact occurs when electrons are transferred by ____________ _____________. |
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Definition
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Term
| Charging by induction occurs in the presence of a charge ________ ________________contact. |
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Definition
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Term
| Charge polarization occurs in insulators that are in the presence of a ___________________ ___________. |
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Definition
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Term
| What is the fundamental rule of electricity? |
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Definition
| Like charges repel, opposite charges attract |
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Term
| You have a neutrally charged atom with 6 electrons. How many protons does it have? |
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Definition
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Term
| If you have an atom that has 6 electrons and 7 protons, what is the charge? |
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Definition
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Term
| A charged atom is called an __________________. |
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Definition
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Term
| A positive ion has lost an __________________. |
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Definition
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Term
| A negative ion has gained or lost one or more electrons? |
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Definition
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Term
| If an object has an abundance of protons or electrons it is ____________ ________________. |
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Definition
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Term
| Can an atom lose protons? |
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Definition
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Term
| Which holds electrons tighter, fur or rubber? |
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Definition
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Term
| When you rub fur on rubber what happens to the fur? |
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Definition
| The fur does not hold tightly to electrons so it lets go of electrons |
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Term
| When you rub fur on rubber what happens to the rubber? |
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Definition
| The rubber accepts the electrons from the fur, making it electrically charged. |
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Term
| When the rubber accepts electrons from the fur, what is the charge of the rubber? |
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Definition
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Term
| When the rubber accepts electrons from the fur, what is the charge of the fur? |
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Definition
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Term
| Why does closeness win when an object is electrically polarized? |
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Definition
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Term
| What kind of law is Coulomb's law? |
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Definition
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Term
| Besides Coulomb's law, name another inverse square law. |
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Definition
| Newton's law of gravitation |
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Term
| Name two differences between Newton's law of Gravitation and Coulomb's law. |
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Definition
Newton : g – small, attract.
Coulomb: k – large, repel and attract. |
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Term
| Friction is/is not a necessary factor in charging an object. |
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Definition
| is not. Electrons can be transferred from one material to another simply by touching. |
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Term
| The continual leaking of charge of the bottom of clouds (-), and the ground (+) is helped by what? |
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Definition
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Term
| What happens if a lightning rod does strike a building with a lightning rod attached to it? |
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Definition
| The lightning rod short-circuits the lightning back into the ground. |
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