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,What constititues a capacitor? - answers:Two conductors separated by an insulator.
What is the purpose of a capacitor? - answers:Stores electrical energy in electrostatic fields.
Does a capacitor cause current to lead or lag voltage in an AC Circuit? - answers:Lead Voltage.
What is the basic unit of capacitance? - answers:Farad.
Why shouldn't electrolytic capacitors be used in an AC circuit? - answers:They are polarized, it
will pass current of one polarity and block the opposite.
What is meant by inductance? - answers:Ability to store electrical energy in electromagnetic
fields.
what is the basic unit of inductance? - answers:Henry.
What is an example of an inductor used in a magneto? - answers:The Coil.
Does an inductor cause current to lead or lag voltage in an AC Circuit? - answers:Lag.
How can you find the polarity of an electromagnet? - answers:Hold the electromagnet in your
left hand with your fingers encircling the coil in the direction electrons flow. Your thumb will
point to the north pole.
What is meant by impedance? - answers:The total opposition to the flow of alternating current. It
is the vector sum of resistance,capacitive reactance, and inductive reactance.
In what units is impedance measured? - answers:Ohms.
,What are the five sources of electrical energy? - answers:Magnetism, chemical energy, light,
heat, and pressure.
What is the basic unit of power in a DC circuit? - answers:Watt.
What is meant by a Kilowatt? - answers:1,000 watts.
What is meant by a Megawatt? - answers:1,000,000 watts.
What is the formula for power in a DC circuit? - answers:Power=Voltage*Current (P=E*I).
What is the relationship between mechanical and electrical power? - answers:1 Horsepower=746
Watts.
What is meant by true power in an AC Circuit? - answers:The product of circuit voltage and the
current in phase with that voltage.
In what unit is true power expressed? - answers:Watts.
What is meant by apparent power in an AC circuit? - answers:The product of circuit voltage and
circuit current.
In what units is apparent power expressed? - answers:Volt-Amps.
What is meant by reactive power in an AC circuit? - answers:The power consumed in the
inductive and capacitive reactances in an AC circuit. Reactive power is also called wattless
power.
In what units is reactive power expressed? - answers:Volt-Amps reactive, or Kilovolt-amps
reactive.
, What is meant by the power factor in an AC circuit? - answers:The ratio to true power and
apparent power. Also the ratio of circuit resistance and circuit impedance.
Which law of electricity is the most important? - answers:Ohm's Law.
What are the elements of Ohm's Law? - answers:Voltage E, current I, and resistance R.
What is voltage? - answers:Electrical pressure.
What is the basic unit of voltage? - answers:Volt.
What instrument is used to measure voltage? - answers:Voltmeter.
Is a voltmeter placed in series or parallel to measure voltage? - answers:Parallel.
What is electrical current? - answers:The flow of electrons in a circuit.
What is the basic unit of current flow? - answers:Amp or ampere.
What part of an amp is a milliamp? - answers:One thousandth of an amp. (0.001)
What instrument is used to measure current? - answers:Ammeter.
What two things happen when current flows through a conductor? - answers:Heat is generated
and a magnetic field surrounds the conductor.
Is an ammeter placed in series or parallel to measure current? - answers:Series.
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