Inductors |
||||||
Inductive
loads
transduce electrical energy into a magnetic field. f decreases XL decreases XL = where f = frequency Resistance = V/I measured in OHMs
> the resulting voltage across a resistive load in an RL circuit is the vector addition of the Voltage applied and the Voltage induced in the inductor which are 180* out phase (pointing in opposite directions) > the symbol for Inductance
is L
(after Lenz) nice to know for advanced years .......>> > inductors cause the current in an AC circuit to go out of phase and LAG the applied Voltage > this can cause power factor problems which can be corrected by the use of capacitors
XL
= where f =
frequency phase shifting of current in an inductive AC circuit note the current lags applied voltage by 90* the phase shifting caused by inductors can be corrected by adding capacitors
When resistance and reactance (XL
and Xc)
are added vectors must be used
since they are out of phase by 90* |