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As the frequency supplied by the generator drops lower,
(1) bulb A brightens, bulb B dims.
(2) bulb A brightens, bulb B remains unchanged.
(3) bulb A dims, bulb B brightens.
(4) bulb A dims, bulb B remains unchanged.
(5) both bulbs brighten.
(6) both bulbs dim.
XC=1/(2pf C)
increases as f
drops: less
current flows!
XL=2pf L increases with f
so drops in value as f drops.
More current flows through
this branch with lower f!
As the frequency supplied by the generator drops lower,
(1) bulb A brightens, bulb B dims.
(2) bulb A brightens, bulb B remains unchanged.
(3) bulb A dims, bulb B brightens.
(4) bulb A dims, bulb B remains unchanged.
(5) both bulbs brighten.
(6) both bulbs dim.
vL
vR
vL+ vR
vL
vR
vC
vtotal
A series RLC circuit has a resistance
of 25.0, a capacitance of 50.0mF,
and an inductance of 0.300 H. If
driven by a 120v, 60Hz source, find:
XL=113.1 
53.1 
the circuit. XZC== 65

circuit. 1.85 A
(a) the impedance of
(b) the current in the
(c) the phase angle between current
and voltage. +76.3o
=46.25v
(d) the rms voltage drop across each VVR=209v
L
VC=98.24v
component.
(e) the power dissipated in the circuit.
(f) What f would make this circuit completely resistive?
(g) What would the power dissipated in the resistor be then?