Physics-Electricity.txt

• Conduction is due to the movement of the free electrons (transferring charge around a circuit);
• metals are a good electrical conductor with large numbers of free electrons;
• insulators are bad conductors with few/no free electrons;

The work done per unit charge in moving a quantity of charge completely around a circuit / the power delivered per unit current / work done per unit charge made available by the source;

• The resistance of a conductor increases with increasing temperature;
• increased power (dissipation) leads to a higher temperature in the resistor / resistor heating up;

• Ideal ammeter has zero resistance;
• ideal voltmeter has infinite resistance;

• The energy gained by an electron when accelerated through an electric field with a potential difference of 1V;
• 1.6x10^-19J;

The force between parallel current-carrying conductors;

• The voltage is (directly) proportional to current / the ratio of potential difference to current is a constant called resistance / the resistance of a conductor is constant provided its temperature is
• constant;

• Consists of two resistors in series or a potentiometer;
• whereby the voltage traveling