Capacitance

Question 1

What are capacitors?

Answer 1

Devices used to store electrical charge. They consist of two conductive plates separated by a gap or dielectric.

Question 2

Which formula is used to calculate the charge of a capacitor charging?

Answer 2

Q = Q0 (1-e^(-t/CR))
This is for CHARGING

Question 3

Which formula is used to calculate the p.d. of a charging capacitor?

Answer 3

V =V0 (1-(e^(-t/CR))
This is for CHARGING

Question 4

Which formulas are used to calculate the energy stored on a capacitor using a Voltage against Charge graph?

Answer 4

Area = energy stored

W = 1/2 QV

W = 1/2 CV^2

W = Q^2/2C