Electric Fields

Question 1

What is an electric field?

Answer 1

A region of space in which a charge experiences a non-contact force.

Question 2

State Coulomb’s law of electric force.

Answer 2

The electrostatic force is proportional to the product of the charges involved and inversely proportional to the distance between them squared.

Question 3

What is the equation for electric force?

Answer 3

F = KQQ/r²

Question 4

If a particle is positively charged, where is the direction of force going?

Answer 4

Away from the centre.

Question 5

If a particle is negatively charged, where is the direction of force going?

Answer 5

Towards the centre.

Question 6

What is Electric field strength?

Answer 6

The force per unit charge acting on a small charge placed at that point in the field.

Question 7

What is the equation for electric field strength?

Answer 7

E = F/q

Question 8

What is the equation for electric field strength at a point r?

Answer 8

E = KQ/r²