Capacitance

• State the function of a

• What it’s made of

• 3 uses

3 materials used for dielectric in capacitors

1. Ceramic

2. Paper

3. Oil

4. Air

5. Polyester

• symbol for capacitor

• Define capacitance

• Equation for capacitance

• Unit for capacitance and define the unit

Factors affecting capacitance

Define permittivity

• Equation for factors that affect capacitance

• equation for relative permittivity of a material

charging and discharging capacitors graphs and show equations for:

• charge

• Current

• Voltage

Compare the following for capacitors in series and in parallel

• charge

• Current

• Voltage

• define time constant and give its equation

• How to calculate new value from initial value

• Draw and give equation for capacitors in series

• Describe what’s going on

• Draw and give equation for capacitors in parallel

• Describe what’s going on

• equation for Energy stored in/ work done on capacitor

• Derive the 2 other equations from this