Magnetism
Electricity
A/C Power
D/C Power
Electric Motors/Generators
100
Like poles______ Unlike poles_______
Repel; Attract
100
_______ is an excellent conductor, a lot of electrical wire is made up of this
Copper
100
The .GIF below demonstrates ________ current
Direct
100
A substance which allows electricity to pass through it is called a
Conductor
100
Windings are generally made of
Copper wire
200
Magnetic Field Lines ________ away from the pole
Curve
200
An electrical current if produced by the movement of __________
Electrons
200
In which direction does the electrons flow in A/C
Backwards and forwards
200
A switch
Breaks or completes a circuit
200
Electric generators convert ___________ energy into ____________energy
Mechanical; electrical
300
An electromagnet is composed of these 3 things
Iron core, Copper Wire and a Power source
300
The .GIF below demonstrates ______ current
Alternating
300
Which type of current is commonly used in a household
A/C
300
Electrons travel at what speed?
The speed of light
300
Windings are wrapped around a ______ core
Iron
400
The two poles of a magnet are _____ and ________
North and South
400
Name a type of Renewable source of Electricity
Solar, wind, water, biomass, geothermal
400
The movement of electrons backwards and forwards is also called______________.
Oscillation
400
D/C items are normally powered by
Batteries
400
Electric motors convert ___________ energy into ___________energy
Electrical; Mechanical
500
The advantage of an electromagnet over an earth magnet is that
Electromagnets can be easily turned off.
500
AN item that does not allow electricity to flow through it is called an ___________________
Insulator
500
What is the standard frequency of A/C electrical current, how many times do the electrons reverse direction?
60 Hertz or 60 times
500
The flow of electrons through a wire is often compared to the flow of _________ through a ___________
Water; hose/pipe
500
The amount of twisting force an electric motor produces is called
Torque