Current Electricity
Electric Charge: a basic property of matter. It occurs in two states: positive + and negative - charge. Current (I) : the movement of charged particles from one place to another, measured in coulombs. It is the rate at which charge flows past a point in the circuit. Is measured in amps (A). An ammeter is used. charge = total charge divided by time taken Potential difference: the amount if energy potential in joules, lost by each coulomb of charge in a given part of a circuit. PotDif = work divided by charge Power: the rate of doing work, or the rate at which energy is transformed from one form to another. Resistance (W): is the ratio of potential difference across a component to the current flowing through it, it is measure in ohms. Res = PotDif divided by current To convert the electrical energy into other forms of energy, loads resist the movement of charge. One coulomb of charge is equal to 6.242 * 10^18 elementary charges. It is the measure of electri...