Motors
True or False: Electric current travels into the motor through long wires that connect directly to a set of elecrtromagnets.
False: they connect to brushes that connect to a commutator
True or False: Generators transfer electrical energy into kinetic energy.
False, they do the reverse. Kinetic energy to electrical energy
Name 2 renewable sources of energy that is used in the US.
Wind energy, solar energy, geothermal energy, hydroelectric energy
True or False: Natural gas is renewable because it's natural.
False because natural gas is created by ancient fossil material
Flat ends of wire attached to commutator
brushes
By turning the electromagnet on and off, the commutator acts as a what in the circuit?
a switch
List 4 things that motors and generators have in common.
electromagnets, commutator, stator (permanent magnets), shaft
Geothermal energy makes up what percent of Iceland's electricity?
about 25%
20%
a rotating switch for the electromagnet in a motor
commutator
True or False: Only two of the three electromagnets are turned on at one time in a motor.
True
When using the hand crank generator, what energy is produced by turning the handle?
kinetic energy
Which country is becoming 100% fossil fuel free?
Sweden
These have been produced by the earth from heat and pressure.
Fossil fuels
Keeps the commutator and rotor in place in motor
axle or shaft
What is the part called that contains the magnets?
the stator
When the electricity goes out
Out of the following energy sources, which are renewable?
oil, water, bamboo, leather, diamonds, sandstone, clay, paper
water, bamboo, leather, paper
Out of the following, which are non-renewable energy sources?
beeswax, wood, asphalt, stone, aluminum, biomass energy, tidal energy, salt
asphalt, stone, aluminum, salt
energy that is reproduced or recycled in the world
What happens in the motor when the electromagnet rotates?
The commutator has one section turn off while another turns on, continuing the motion of the shaft turning.
Fill in the blanks: Generators transfer _______________ energy into ______________ energy.
Generators transfer kinetic energy into electrical energy.
How does a solar panel work?
The sun shines on the panel which transfers the light energy into electrical energy which transfers to the lightbulbs.
Fill in the blanks: Energy cannot be ______________ or ______________; energy can only be _______________________.
Energy cannot be created or destroyed; energy can only be transferred.
energy that cannot be reproduced and once it is used, it’s gone.
non-renewable energy