Capacitance

Question 1

Define capacitor

Answer 1

Two conducting plates separated by an insulator

Question 2

Define capacitance

Answer 2

Charge stored per voltage

Question 3

What is the equation for capacitance?

Answer 3

Charge/PD

Question 4

What are the units of capacitance?

Answer 4

Farads (F)

Question 5

What is a farad in SI units?

Answer 5

CV^-1

Question 6

What is a dielectric?

Answer 6

An insulator between the plates which increases capacitance

Question 7

What is the equation for capacitance in a known capacitor?

Answer 7

C= E0A/d

Question 8

What are the equations for energy stored in a capacitor?

Answer 8

U= 1/2QV
=1/2Q^2/C
=1/2V^2C

Question 9

What is the equation for capacitance in series?

Answer 9

Ct=1/C1+1/C2+1/C3

Question 10

What is the equation for capacitance in parallel?

Answer 10

Ct=C1+C2+C3

Question 11

What is the time constant?

Answer 11

RC- the time for a capacitor to charge/discharge to 37% of its maximum charge

Question 12

What is the equation for current in a charging AND discharging capacitor?

Answer 12

I=I0e^-t/RC

Question 13

What is the equation for voltage/charge in a charging capacitor?

Answer 13

V=V0(1-e^-t/RC)

Question 14

What is the equation for voltage/charge in a discharging capacitor?

Answer 14

V=V0e^-t/RC