Impedance
Total opposition to current flow in an AC circuit is referred to as ___.
Impedance
In the Ohms Law Wheel, What does R Represent?
Resistance
Inductive reactance is related to ___.
Magnetic fields
___ flow equals current flow.
Electron
Transformers should be used within their nameplate ratings to reduce ___.
Excessive heating
Apparent power is measured in ___.
Volt-Amps or V/A's
In the Ohms Law Wheel, What does P Represent
Power
___ is the property of an electrical circuit that opposes any change in current.
Inductance
Transformers are used by utility companies for power transmission to step up voltages and reduce ___.
Current / Amperage
A(n) ___ transformer is used for sensitive electronic equipment to help “clean up” the power.
Isolation
___ are used to correct power factor.
Capacitors
In the Ohms Law Wheel, What does E stand for
Electromotive force / Voltage
In a purely capacitive circuit, current is said to ___ the applied source voltage.
Lead
What type of magnet is used for the coil in a relay?
Electromagnet
Most commonly, loads are connected to the transformer leads, terminals, or lugs marked as the ___.
Secondary
__ power is power consumed by a resistor, dissipated as heat, and not returned to the generation source.
True
In the Ohms Law Wheel, What does I Reperesent?
Amperage
In a purely resistive circuit, current is said to ___ the applied source voltage.
Be in phase with
___ Law states “charged bodies attract or repel each other with a force that is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.”
Coulomb’s
Ignoring losses, ___ is equal on both sides of a step-up or step-down transformer.
Power
___ power is power that passes through reactive components, which do not consume energy, and returns to the source.
Reactive
How many Amps are drawn on this 1Ø circuit:
90,672W
480V
189A
In an AC circuit containing resistance plus inductance, or resistance plus capacitance, or resistance plus inductance and capacitance, the opposition to current flow is called ___.
Impedance
The invisible magnetic lines that leave the north pole and enter the south pole of a magnet are ___.
Lines of flux
A 1Ø transformer that has a power rating of 500 VA can deliver ___ amps of current to a 120-volt load without overheating the windings.
4.17A