|
The same voltage is
across the three
components, since they
are in parallel.
This is shown by the
horizontal phasor.
Since the current
through the resistor is
in phase with the
applied voltage, then it
is shown on the same
phasor.
Remembering CIVIL,
capacitive current leads
the voltage by 90
degrees, inductive
current lags the voltage
by 90 degrees.
At resonance, the
capacitor and inductor
currents are equal and
180 degrees out of
phase.
They therefore cancel
each other out, and we
are left with the effect
of resistance only.
Since resistor voltage
and current are in
phase, the circuit
voltage and current will
be in phase.
A parallel resonant
circuit has a high
impedance.
This is called the
dynamic resistance.
The formula is L/C*R
|
