Basic Electricity Ch.4
The values of Inductive reactance and R determine the angle of ______
Impedance (Z) Basic Electricity Ch4 p.33
What does ELI ICE mean?
In a purely resistive circuit, the voltage and current are in phase In a purely inductive circuit, the applied voltage leads the current by 90 degrees In a purely capacitive circuit, the currents leads the applied voltage by 90 degrees Basic Electricity Ch4 p.2
In the ideal parallel resonant circuit at resonance, the branch currents are equal, so the line current is zero and the circuit impedance is ?
Infinite
Transformers are often used to....
Match the impedance of a source to that of a load Chpter 4 pg 160
The magnitude of the current in series LC circuit is determined by ______.
Ohm's Law Basic Electricity Ch4 p.83
______ is the ratio of inductive reactance to resistance.
Q, the merit rating Basic Electricity Ch4 p.36
The ______ is the total power delivered by the source.
apparent power Basic Electricity Ch4 p.84
As in all RL and RC circuits, frequency of applied voltage determines many characteristics of a parallel RC such as ______.
capacitive reactance which also affects impedance, line current, and phase angle Basic Electricity Ch4 p.73
As used in electrical circuits, the term ______ means to offer large opposition to, or reject, voltages and currents of certain frequencies, and at the same time offer little opposition to, or pass, voltages and current of other frequencies.
filter Basic Electricity Ch4 p.149
In a series LC circuit, one of the voltage drops, either E(L) or E(C) is always ______ the applied voltage.
greater than Basic Electricity Ch4 p.80
The ______ of a parallel RL circuit is always less than the resistance or inductive reactance of any of the branches.
impedance Basic Electricity Ch4 p.48
In an RL circuit, both resistance and inductive reactance oppose current flow. The combined effect is called ...
impedance (Z) Basic Electricity Ch4 p.26
As the frequency ______ in a parallel RL circuit, the impedance comes closer and closer to the value of the resistance.
increases Basic Electricity Ch4 p.50
The current in each branch of a parallel RC circuit is ______ the current in the other branches.
independent of Basic Electricity Ch4 p.68
Current in a purely capacitive circuit ______ the voltage by 90 degrees.
leads Basic Electricity Ch4 p.55
At resonance, the ______ in a practical resonant circuit is ______ with the applied voltage.
line current, in phase Basic Electricity Ch4 p.138
Two identifying characteristics of resonance in a series LCR circuit are ______.
low impedance and large current For any given circuit, the impedance is at its minimum and the current is at its maximum resonance. Basic Electricity Ch4 p.101
______ are used to describe the time relationships between AC voltage and currents.
phase angles Basic Electricity Ch4 p.14
The frequency at which the net reactance is zero, or where X(L) equals X(C), is known as the ______.
resonant frequency Basic Electricity Ch4 p.100
In a parallel RC circuit, each branch voltage is ______ the applied voltage.
the same as Basic Electricity Ch4 p.67
The line current in a parallel LCR circuit is equal to ______ of the three branches.
the vector sum Basic Electricity Ch4 p.125
______ must be used to calculate impedance of a parallel RC circuit.
vector addition Basic Electricity Ch4 p.72
The impedance of a parallel LCR circuit is found by finding the net reactance, X, of the L and C branches and combining it ______ with ______.
vectorially, R Basic Electricity Ch4 p.131
The voltages across the branches of a parallel LC circuit are the same as the applied voltage. Because of this the voltage is used as the ______.
zero-degree phase reference Basic Electricity Ch4 p.115