Electric Fields

Question 1

What symbol represents the permittivity of free space?

Answer 1

𝜀₀

Question 2

When calculating the force between two particles, what can air be treated as?

Answer 2

A vacuum

Question 3

For a charged sphere the charge can be assumed to be at what part of the sphere?

Answer 3

The centre

Question 4

Which is stronger: the gravitational force of subatomic particles or the electrostatic force?

Answer 4

The electrostatic force

Question 5

Electric field lines always go from _____ to _____

Answer 5

Electric field lines always go from positive charge to negative charge

Question 6

What is electric field strength?

Answer 6

The force per unit charge acting at a point in an electric field

Question 7

What is the magnitude of E (electric field strength) in a uniform electric field?

Answer 7

Potential difference between plates (V) / distance between plates

Question 8

What is the trajectory of a particle entering a uniform field at right angles?

Answer 8

It is parabolic

Question 9

How is electric potential related to electric field strength?

Answer 9

E = ΔV/Δr (change in electric potential with respect to change in radius)