electric fields Flashcards
What does coloumbs law states
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
What can air be treated as in an electric field
As a vacuum
What is greater the gravitational force between two sub particles or their electrostatic force
- electrostatic as their charge is much bigger than their masses
Define electric field stength
The force per unit charge experiences by an object in an electric field
What do the field lines direction show you
The direction of the force acting on a positive charge
What shape does an ion follow in a parallel plate with an electric field
Parabolic
What will an ion experience in a parallel plate with a potential difference?
A constant electric force
An acceleration of the particle
When a particle is shot into a nucleus when it is closest to the nucleus what happens to its speed?
It will be at its smallest
What is the unit of electric field strength
Vm^-1
Describe the motion of an electron in an electric field
- horizontal component of velocity is unchanged
- Vertical acceleration due to force
- parabolic curve
State and explain the location of excess electrons
Found on the outer surface (outer shell) because they mutually repel eachother
Is electric potential a vector or scalar quantity?
Scalar
True or false
When electric potential is zero this means electric field strength is zero?
False
