1a. Electrostatics

Question 1

What is Electric charge, Q?

Answer 1

• It is a property of matter
• can be repulsive or attractive
• Measured in Coulombs, C.

Question 2

True or false:

Triboelectric effect is the name for static electricity

Answer 2

True

Question 3

What is Coulomb’s Law?

The equation

Answer 3

Force = 1/4πε0 * q1q2/r^2

• where like particles repel and unlike particles attract

Question 4

What is the equation for Electric field strength,E?

Answer 4

E = F / q

or

E = V/L

Question 5

What directions do the lines of a positive and negative charge go using electric field lines?

Answer 5

• positive, outwards
• negative, inwards

Question 6

What is voltage?

Answer 6

It is the potential difference between two points, often from electrostatic potentials.
* units are J/C