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Introduction to Electricity Unit 7
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An electric heater draws 3.5 A from a 110 V source. The resistance of the heat element is approximately
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Give an example of a control device
Give an example of a protective device
Give an example of a load
Give an example of a conductor
Give an example of a power source
The standard unit of measure used for electric power.
Watt
The standard unit of measure for electric potential (voltage).
Volt
A semiconductor device used in an electric circuit to regulate current flow to act as a gate, switch, or amplifier for electronic signals.
Transistor
An electrical component that transfers electrical energy using inductive coupling between two winding circuits.
Transformer
A material that behaves between a conductor and an insulator depending on the conditions.
Semiconductor
A basic electronic component that prevents the flow of electric current.
Resistor
A law of physics that describes the relationship between voltage, current, and resistance using the equation V = IR.
Ohm's Law
The standard unit of measure for resistance.
Ohm
The magnetic influence produced by electric currents and magnetic materials.
Magnetic field
A material in which an electronic charge does not flow freely and does not conduct the flow of electric current
Insulator
A basic passive electrical component that resists changes in electric current. They are generally made by winding or coiling a wire, sometimes around a magnetic core. The unit of measure is the Henry.
Inductors
A basic subatomic particle found in all atoms, they carry electricity by flowing from one atom to the next in a conductive material.
Electrons
The interaction between magnetic fields and electric currents.
Electromagnetism
It is the difference in electrical charge between two points in a circuit. It is also called the voltage.
Electric potential
It is the flow of electric charge through a material. The standard unit is the ampere.
Electric current
It's a collection of electronic components connected by a conductive wire that allows for electric current to flow.
Electric circuit
This is a basic characteristic of matter that is based on the balance of protons (positive charge) and electrons (negative charge). The standard unit is the coulomb
Electric charge
A type of current that only flows in one direction (unlike AC which periodically reverses direction).
Direct current (DC)
An electronic component that only allows current flow in one direction
Diode
A law of physics that describes the electrostatic interaction between charged particles.
Coulomb's law
It's a material that allows the free flow of electric charge.
Conductor
A basic electrical component that stores electric charge. They are made from two electrical conductors separated by an insulator.
Capacitor
A device that stores and produces electricity from chemical cells.
Battery
An electric current that reverses direction on a periodic basis. It is widely used to transport power on power lines
Alternating current (AC)
It is the standard unit of measure of electric current.
Amp or Ampere


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