Electricity and Electrical Systems (correct answers)
In-class activity
What is Current? correct answers The result of a force applied to make an electron flow
between atoms.
What is Conductor? correct answers A medium (usually a wire or cable) through which
electrons flow.
Identify the source and flow of electricity in conductors correct answers Electricity and
Current
What is the Electricity? correct answers Is a convenient form of energy because it
readily moves from one location to another.
What is current? correct answers Electricity is a phenomenon involving the motion and
effect of electrically charged particles.
What happens when a force is applied to an atom? correct answers If the force is strong
enough to make an electron travel, or flow, between atoms, the result is an electrical
current.
What is a conductor? correct answers A medium through which electrons flow.
What are the two types of Electrical flows? correct answers AC (alternating Current) DC
(Direct Current)
What is the definition of AC Current? correct answers Since the magnetic field is
strongest at the center, as the conductor enters the field, current begins to flow and
builds to a maximum at the center of the field.
What type of current is generated by a generator? correct answers AC
What is AC frequency? correct answers The rate at AC completes a cycle.
What is 3 phase power? correct answers It's supplied power provided by 3 separate
winding, each generating its own single phase wave form for each 360 electrical
degree.
What electrical phase do lights use? correct answers Single Phase
What electrical phase do Commercial Equipment Use? correct answers 3 phase
What is the definition of DC Current? correct answers DC Flows continuously in one
direction; it does not alternate.
, What is the most common source of DC power? correct answers Batteries
What converts AC to DC power? correct answers Rectifier
What is a Rectifier? correct answers Sometimes used by high tech tenants in buildings
to produce DC for specialized electronic equipment
What is definition of "Grounding"? correct answers Means safely connecting electrical
equipment and devices to the earth.
Why is grounding important? correct answers Grounding provides an emergency path
to remove current safely in case of a malfunction in the electrical system.
What are grounding connection points? correct answers - Metal rod in the ground.
- Building steel structure
- Plumbing system
- Anything barried
What is the measurement of pressure of electric current? correct answers VoLTE (V)
What tool do you use to measure Volts? correct answers Voltmeter
What is the measure of the flow of electric current in an electrical Circuit? correct
answers Ampere (A or Amp)
What tool do you use to measure Ampere? correct answers Ammeter
What is the unit of measure for resistance to the flow of electricity in a conductor?
correct answers Ohm
What is Ohms Law? correct answers Describes the relationship between voltage (V or
E), resistance (R), and Current (I) E=I*R or R=E/I or I=E/R
What is the Watt/Kilowatt? correct answers Electricity is consumed at a rate of one watt
when one volt causes a current of one ampere for flow in a circuit.
What is the formula for Power (W)? correct answers Power(W)= Voltage (V) x Current
(A)
P=ExI
What are the electrical categories? correct answers - Feeder Circuit
- Branch Circuit
- Dedicated Branch Circuit
In-class activity
What is Current? correct answers The result of a force applied to make an electron flow
between atoms.
What is Conductor? correct answers A medium (usually a wire or cable) through which
electrons flow.
Identify the source and flow of electricity in conductors correct answers Electricity and
Current
What is the Electricity? correct answers Is a convenient form of energy because it
readily moves from one location to another.
What is current? correct answers Electricity is a phenomenon involving the motion and
effect of electrically charged particles.
What happens when a force is applied to an atom? correct answers If the force is strong
enough to make an electron travel, or flow, between atoms, the result is an electrical
current.
What is a conductor? correct answers A medium through which electrons flow.
What are the two types of Electrical flows? correct answers AC (alternating Current) DC
(Direct Current)
What is the definition of AC Current? correct answers Since the magnetic field is
strongest at the center, as the conductor enters the field, current begins to flow and
builds to a maximum at the center of the field.
What type of current is generated by a generator? correct answers AC
What is AC frequency? correct answers The rate at AC completes a cycle.
What is 3 phase power? correct answers It's supplied power provided by 3 separate
winding, each generating its own single phase wave form for each 360 electrical
degree.
What electrical phase do lights use? correct answers Single Phase
What electrical phase do Commercial Equipment Use? correct answers 3 phase
What is the definition of DC Current? correct answers DC Flows continuously in one
direction; it does not alternate.
, What is the most common source of DC power? correct answers Batteries
What converts AC to DC power? correct answers Rectifier
What is a Rectifier? correct answers Sometimes used by high tech tenants in buildings
to produce DC for specialized electronic equipment
What is definition of "Grounding"? correct answers Means safely connecting electrical
equipment and devices to the earth.
Why is grounding important? correct answers Grounding provides an emergency path
to remove current safely in case of a malfunction in the electrical system.
What are grounding connection points? correct answers - Metal rod in the ground.
- Building steel structure
- Plumbing system
- Anything barried
What is the measurement of pressure of electric current? correct answers VoLTE (V)
What tool do you use to measure Volts? correct answers Voltmeter
What is the measure of the flow of electric current in an electrical Circuit? correct
answers Ampere (A or Amp)
What tool do you use to measure Ampere? correct answers Ammeter
What is the unit of measure for resistance to the flow of electricity in a conductor?
correct answers Ohm
What is Ohms Law? correct answers Describes the relationship between voltage (V or
E), resistance (R), and Current (I) E=I*R or R=E/I or I=E/R
What is the Watt/Kilowatt? correct answers Electricity is consumed at a rate of one watt
when one volt causes a current of one ampere for flow in a circuit.
What is the formula for Power (W)? correct answers Power(W)= Voltage (V) x Current
(A)
P=ExI
What are the electrical categories? correct answers - Feeder Circuit
- Branch Circuit
- Dedicated Branch Circuit
