Electricity

Define current

The rate of flow of charge

Define potential difference

Work done per unit charge

What is the effect of temperature on resistance of a metal conductor?

Resistance increases as temperature increases.

What is the effect of temperature on resistance of a thermistor?

Resistance decreases as temperature increases

Define superconductivity

A material that has no resistance when cooled below a critical temperature

Describe current in a series circuit

Current is the same everywhere

Describe current in a parallel circuit

The total current is shared between branches

Describe voltage in a series circuit

Voltage is shared between components

Describe voltage in a parallel circuit

Voltage is the same everywhere

What is emf?

Terminal potential difference when no current flows

What is the potential divider formula?

Vout = Vin (R2/R1+R2)