Transcript Number 1 - HomeworkNOW.com

Bottle Rocket Project - Materials
• Per group (no more than 3 people per group),
you will need:
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2 plastic 2-liter bottles (empty and rinsed out)
2 plastic folders
A roll of duct tape or reinforced packing tape
About a cup of rice (UNCOOKED) in a “zip-lock”
bag
Number 1
Magnet – any material that contains iron, nickel,
or cobalt and it attracted to materials
containing iron, nickel, or cobalt
Number 2
Pole – the part of a magnet where the magnetic
effects are strongest
Number 3
Solenoid – coil of wire that produces a magnetic
field when carrying an electric current
Number 4
Electromagnet – a solenoid with an iron core in
the center
Number 5
Electromagnetic induction – producing electric
current by a changing magnetic field
Number 6
Generator – device that uses electromagnetic
induction to convert kinetic energy into
electrical energy
Number 7
Electric Motor – a device that uses electrical
energy to do work
Number 8
Transformer – a device that increases or
decreases the voltage of alternating current
Number 9
Electromagnetism – the interaction between
electricity and magnetism
Number 10
Electric power – the rate at which energy is used
to do work; expressed in watts (W)
Magnetic Fields
Draw the magnetic field on your worksheet.
Magnetic Fields
Draw the magnetic field on your worksheet.
Magnetic Fields
Draw the magnetic field on your worksheet.
Magnetic Fields
What would happen to the magnetic field lines
as the N and S poles get closer together?
Magnetic Fields
Draw the solenoid on your worksheet?
Solenoid
How can they be made stronger?
• Increase the number of coils
• Increase the current
Electromagnet
How can they be made stronger?
• Increase the number of coils
• Increase the current
• Increase the size of the iron core
Generator
Draw the generator on your worksheet.
Mechanical
(Kinetic) Energy in
Electrical Energy out
Coils of wire
Magnet
Electric Motor
An electric motor is the opposite of a generator.
Mechanical (Kinetic)
Energy out
Electrical Energy in
Coils of wire
Magnet
Transformer
Draw the following transformer.
More turns, higher voltage
Fewer turns,
lower voltage