electric fields Flashcards

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1
Q

What does coloumbs law states

A

Magnitude of force between two point charges in a vacuum
- is directly proportional to the product of their chargers
- inversely proportional to the square between their distances

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2
Q

What can air be treated as in an electric field

A

As a vacuum

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3
Q

What is greater the gravitational force between two sub particles or their electrostatic force

A
  • electrostatic as their charge is much bigger than their masses
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4
Q

Define electric field stength

A

The force per unit charge experiences by an object in an electric field

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5
Q

What do the field lines direction show you

A

The direction of the force acting on a positive charge

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6
Q

What shape does an ion follow in a parallel plate with an electric field

A

Parabolic

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7
Q

What will an ion experience in a parallel plate with a potential difference?

A

A constant electric force
An acceleration of the particle

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8
Q

When a particle is shot into a nucleus when it is closest to the nucleus what happens to its speed?

A

It will be at its smallest

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9
Q

What is the unit of electric field strength

A

Vm^-1

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10
Q

Describe the motion of an electron in an electric field

A
  • horizontal component of velocity is unchanged
  • Vertical acceleration due to force
  • parabolic curve
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11
Q

State and explain the location of excess electrons

A

Found on the outer surface (outer shell) because they mutually repel eachother

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12
Q

Is electric potential a vector or scalar quantity?

A

Scalar

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13
Q

True or false

When electric potential is zero this means electric field strength is zero?

A

False

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