What is Electric Current?

What is the charge of an electron?

What Direction does Current flow?

What is Potential Difference?

What is the EMF of a Circuit?

What is an Electronvolt?

What does Ohm's Law state?

How does Increasing Temperature affect Resistance?

Why do we use Resistivity?

What is Resistivity?

Why is Resistivity Quoted at a Specific Temperature?

What are Semiconductors?

How can Semiconductors Conduct?

How do the Valence and Conduction Bands Interact in Conductors and Insulators?

What is a "Hole"?

Why does Resistance Decrease as Temperature Increases in a Thermistor?

What reduces the resistance in an LDR?

How do Semiconductor Diodes work?

How can you make a Superconductor?

Why are Superconductors used?

What is Drift Velocity?

Current in Circuits

P.d. in Circuits

Resistance in Series Equation

Resistance in Series Derivation

Resistance in Parallel Equation

Resistance in Parallel Derivation

V I Graph for a Filament Lamp

V I Graph for Ohmic Conductor

V I Graph for Semiconductor Diode

V I Graph for Thermistor

How does P.d. Vary Along a Wire?

What is a Potential Divider Circuit?

What is the Equation used for a Potential Divider Circuit?

What happens when a potential Divider Circuit has a Sensor Component in it?

What is Internal Resistance?

How does the Internal Resistance Affect the Circuit?