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52 Cards in this Set

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Electrostatics

The study of electric charges at rest

Study

Electrical Force

A force that one charge exerts on another. When the charges are the same sign, they repel; when the charges are opposite, they attract. Charge

Charge

The fundamental electrical property to which the mutual attractions or repulsions between electrons or protons is attributed

Electrical property

Conservation of Charge

The principle that net electric charge is neither created nor destroyed but is transferable from one material to another

Coulomb's Law

The relationship among electrical force, charges, and distance: The electrical force between two charges varies directly as the product of the charges and inversely as the square of the distance between them

Coulomb

SI unit of charge. One coulomb (symbol C) is equal to the total charge of 6.24x10^18 electrons

F=G•m1•m2


———


d^2

Force equals gravity times mass one times mass two over distance between them squared

F=k• q1•q2


———


d^2

Force equals proportionally constant times quantity of charge one times quantity of charge two over the distance between them squared

k=9,000,000,000 N•m^2/C^2


k=9.0x10^9 N•m^2/C^2

Proportionally constant equals 9.0x10^9 times newtons or coulombs (squared if coulombs) times distance squared

Conductors

Material, usually a metal through which electric charge can flow. Good conductors of heat are generally good charge conductors.

Insulators

A material that is a poor conductor of electricity

Semiconductors

Material that can be made to behave as either a conductor or an insulator of electricity

Induced

Term applied to electric charge that has been redistributed on an object because of the presence of a charges object nearby

Induction

The charging of an object without direct contact

Grounding

Allowing charges to move freely among a connection between a conductor and the ground

Electrically Polarized

Term applied to an atom or molecule in which the charges are aligned so that one side is slightly more positive or negative than the opposite side

If the charge of either nucleus or the orbital electron were greater, the force between the nucleus and the electron would be

Greater

If the distance between the nucleus was doubled, the force would be

1/4 as much

The mass of a proton is _______ times greater than the mass of an electron

2,000

A charged atom is an

Ion

What is the principle of conservation of charge?

No charge is created, it is simply passed along

How many electrons are in 1C of charge?

6.24x10^18

Thin layers of semiconducting materials sandwiched together make

Transistors

The _______ is a practically infinite reservoir for electric charge

Ground

Benjamin Franklin's discoveries

1. Lighting is an electrical phenomenon


2. Lighting rods

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

An object that has unequal numbers of electrons and protons is

Electrically charged

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

An object that has unequal numbers of electrons and protons is

Electrically charged

__________ move easily in good conductors and poorly in good insulators

Electrons

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

An object that has unequal numbers of electrons and protons is

Electrically charged

__________ move easily in good conductors and poorly in good insulators

Electrons

Two ways electric charge can be transferred are by

Friction and contact

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

An object that has unequal numbers of electrons and protons is

Electrically charged

__________ move easily in good conductors and poorly in good insulators

Electrons

Two ways electric charge can be transferred are by

Friction and contact

If a charged object is brought NEAR a conducting surface, even without physical contact, electrons will

Move in the conducting surface

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

An object that has unequal numbers of electrons and protons is

Electrically charged

__________ move easily in good conductors and poorly in good insulators

Electrons

Two ways electric charge can be transferred are by

Friction and contact

If a charged object is brought NEAR a conducting surface, even without physical contact, electrons will

Move in the conducting surface

Charge polarization can occur in

Insulators that are NEAR a charged objects

The fundamental rule at the base of all electrical phenomena is that __________

Like charges repel and opposite charges attract

An object that has unequal numbers of electrons and protons is

Electrically charged

__________ move easily in good conductors and poorly in good insulators

Electrons

Two ways electric charge can be transferred are by

Friction and contact

If a charged object is brought NEAR a conducting surface, even without physical contact, electrons will

Move in the conducting surface

Charge polarization can occur in

Insulators that are NEAR a charged objects