Definitions Flashcards

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1
Q

Coulombs law

A

The magnitude of the electrostatic force exerted by one point charge and is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

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2
Q

Electric field

A

the electric field that exist at a point is the electrostatic force experienced by a small charge itself.

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3
Q

Ohms law

A

At constant temperature the potential difference across a conductor id directly proportional to the current strength in the conductor

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4
Q

electrostatics

A

Study of a charge at rate

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5
Q

First property of charge: charged is conserved. Law of conservation

A

The net charge of an isolated system remains constant. alternatively the electric charge can either be created or destroyed.

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6
Q

Second property of charge: charges can be positive or negative

A

Like charges repel each other and unlike charges attract each other.

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7
Q

Third charge property: charge can be quantized.

A

The charge can only have values that are integral multiples of the fundamental charge.

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8
Q

Forth property of charge: charges can be induced

A

A method of “creating” or generating static electricity in a material by brining an electrically charged object near it.

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9
Q

Fifth property of charge: A charge can be polarized.

A

Polarization occurs when an electric field distorts the negative cloud of electrons around positive atomic nuclei in a direction opposite the field.

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10
Q

Electrical conductors

A

Substances that readily conduct electric charge

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11
Q

Electric insulators

A

Materials that conduct electric charge poorly

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12
Q

direction of charge: towards

A

attractive force point TOWARDS the charge exerting force

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13
Q

Direction of charge: Away

A

A repulsive force points AWAY from the charge exerting force.

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14
Q

Electric field lines

A

provide a map of the electric field in the space surrounding electric charges. always directed away from the positive charge and towards the negative charge

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15
Q

Electric dipole arragment

A

The number of lines leaving a positive charge or entering a negative charge is proportional to the magnitude of the charge

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16
Q

Draw of electric field

A
  1. Always perpendicular to the surface of a charged object.
  2. never touch or intersect one another
  3. closest to one another where electric field is the strongest
  4. Point in direction a positive test charged would move.
  5. Surround a charge in all directions
  6. Number of field lines crossing a surface perpendicular to a field is proportional to the charge and close to it.
17
Q

Direction of electric field

A

The direction at a particular point is the direction in which a test charge would move if placed at that point.