Electric fields DONE Flashcards

1
Q

Define an electric field

A

A region in which a charged particle experiences a non-intact force
Either attraction or repulsion

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2
Q

State what arrows on electric field show and what the density of the lines represents

A

Field lines shows direction of the force experienced
By a positive charge in an electric field
Density of lines shows strength of field

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3
Q

State what Coulomb’s law calculates

A

The force of attraction/ repulsion between two point charges in a vacuum

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4
Q

What is ε_0 in the Coulomb’s law formula

A

The permittivity of free space

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5
Q

Define electric field strength

A

Force per unit positive charge

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6
Q

State whether electric field strength is a vector. If yes, describe the direction it will have

A

Yes

Points in direction that a positive charge would move

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7
Q

Describe the difference between the field strength of a uniform field and the field strength of a radial field

A

In a uniform field, field strength is the same everywhere

In a radial field, field strength depends where you are

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8
Q

What can be considered to have a radial field?

A

A point charge

Or a body which behaves as it all its charge is concentrated at the centre

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