Physics Chapter 6: Electricity

Question 1

Permittivity

Answer 1

is a measure of how well a material can store or transmit electric field energy, influencing the strength of the electric field within the material.

Higher permittivity (𝜀) → The material stores charge more easily (it allows electric fields to develop more strongly within it).
Lower permittivity (𝜀) → The material resists storing charge (it allows weaker electric fields within it).

Vaccum has low permittivity because there is nothing to polarize

This polarization helps store more charge, increasing the material’s ability to hold electrostatic energy.

Question 2

Any form of matter has a ___________ permittivity than the permittivity of free space

Answer 2

Higher

Permittivity = reisistance to electric field formation.

Atoms can resist electric field formation because they can polarize

therefore anything other than free space is higher.

Question 3

Capacitance formula

Answer 3

C = ε0(A/d)

Question 4

Definition of capacitance

Answer 4

ability of a system to store electric charge per unit of electric potential difference between its conductors

Question 5

permittivity of free space constant (ε0)

Answer 5

9×10-12 F/m

Question 6

Capacitance is measured in

Answer 6

Farads

Question 7

Electric field strength between 2 plates

Answer 7

E =V/d. can be measured either in force per charge (N/C) or volts per m (V/m)

Question 8

Force on a particle in a uniform electric field equation

Answer 8

F = qE

Question 9

Force between two point charges (Coulomb’s law)

Answer 9

k = coulomb’s constant = 9 X 10 ^9 Nm^2C^-2

Question 10

Coulomb’s constant

Answer 10

9 X 10 ^9 Nm^2C^-2

Question 11

Permittivity

Answer 11

is a measure of how much a material resists the formation of an electric field within it. It determines how a material influences electric field interactions.

Question 12

energy stored in a capacitor

Answer 12