Quote Originally Posted by PeterB
Hi Donald,

there are actually 3 types of AC component loads: resistive, inductive and capacitive. When analysing a circuit, these 3 components will exist to varying degrees. e.g. an AC motor has a high inductance, a moderate resistance and a small capacitance (between its windings). The complex electrical impedance (a.k.a. AC impedance) of the lumped combination of the components can be calculated. This AC impedance will have two parts to it - a resistive (or 'real') part and a reactive (or an 'imaginary') part. In the case of a motor the reactance will be 'inductive', and in the case of a fluorescent light the reactance can be 'capacitive'.

The effect of inductive reactance is to cause the current to lag the voltage, while that of capacitive reactance is to cause the current to lead the voltage.

Anyway, I posted this more just to correct a point rather than benefit the original question. So I should probably add something useful for foto-r3.


Thanks for elaborating.