Download Name ______ period __

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Electric machine wikipedia, lookup

Alternating current wikipedia, lookup

History of geomagnetism wikipedia, lookup

Magnetic core wikipedia, lookup

Lorentz force wikipedia, lookup

Electromagnet wikipedia, lookup

Magnetic monopole wikipedia, lookup

Maxwell's equations wikipedia, lookup

Wireless power transfer wikipedia, lookup

Magnetoreception wikipedia, lookup

Superconductivity wikipedia, lookup

Electromagnetism wikipedia, lookup

History of electromagnetic theory wikipedia, lookup

Magnetic field wikipedia, lookup

Neutron magnetic moment wikipedia, lookup

Coilgun wikipedia, lookup

Scanning SQUID microscope wikipedia, lookup

Eddy current wikipedia, lookup

Superconducting magnet wikipedia, lookup

Magnetohydrodynamics wikipedia, lookup

History of electrochemistry wikipedia, lookup

Force between magnets wikipedia, lookup

Faraday paradox wikipedia, lookup

Hall effect wikipedia, lookup

Electricity wikipedia, lookup

Magnetism wikipedia, lookup

Magnetochemistry wikipedia, lookup

Electromotive force wikipedia, lookup

Multiferroics wikipedia, lookup

Ferrofluid wikipedia, lookup

Magnet wikipedia, lookup

Friction-plate electromagnetic couplings wikipedia, lookup

Induction heater wikipedia, lookup

Aurora wikipedia, lookup

Magnetic nanoparticles wikipedia, lookup

Earth's magnetic field wikipedia, lookup

Transcript
Name _____________________________________________date _________ period __
Physical Science
Unit 6
Motion
1. Permanent magnets – are magnetic all the time (___________________) Other
substances can be made into _______________ magnets by placing a strong
permanent magnet __________ them or by stroking them with a permanent magnet.
2. Materials are classified as either magnetically __________ or ________. Hard –
easily __________________ but looses magnetic properties easily. Soft – difficult
to magnetize but ________ ________ ________________ its magnetic properties.
3. Magnetic Force - the ____________________ __________ exerted by magnets. It
depends on: * the _______________ of the magnet * the ___________________
an object is from the magnet
4. Magnetic Poles - Magnets have a pair of _____________, a north pole and a south
pole. Like poles _____________ (S/S or N/N) Unlike poles ________________
(N/S) Just like with ______________________ ___________________
5. Magnetic Fields - The ________________ where a magnetic force can be _______.
Magnetic Field lines are used to show the ___________________ field. A _______
needle will always point along a ______________ _________. The lines are close
together where the magnetic force is __________, and spread out where it is ______
6. Earth as a Magnet - Earth acts like a giant ________ magnet. It has a ___________
and ____________ pole. These magnetic poles are not the same as the __________
poles. The pole that is above Canada is actually a magnetic ______________ pole
and the one in Antarctica is a _______________ pole – to reduce confusion they are
named for the ___________________ pole
7. Earth’s magnetic field has ________________ direction more than _____ times in
the last 5 million years.
8. Magnetism and Electric Current - In 1820, Hans Oersted found that _____________
is produced by moving ________________ _____________ by experimenting with
the effects of an electric current on the _________________ of a compass.
9. A ______________-carrying wire creates a ________________ field that forms in
concentric circles ____________ the wire. Right Hand Rule – if you hold a wire in
your right hand with your thumb pointing in the direction of the____ current, your
fingers would curl in the direction of the _____________________ field.
10.The ________________ field created by the current-carrying wire is very ________
To create a __________________ magnetic field: Increase the ____________ in
the wire Wrap the wire in a ____________ (solenoid)
11.Solenoids - Each __________ of wire adds to the ______________ of the magnetic
field of the loop next to it. The _________________ of the magnetic field depends
on the ________________ of loops of wire and the amount of ________________
in the wire.
12.Electromagnet - If you add an ___________ rod in the
center of the _____________ (in a solenoid) it will create an
___________________. This adds to the magnetism of the
coil creating a ____________________ magnet.
13.Electromagnetic Devices - _____________________ – used to measure _________
in ammeters and voltage in voltmeters. Electric motors – convert _______________
energy to ___________________ energy to cause motion. Stereo speakers –
magnetic ______________cause motion that produce ________________ waves
14.Faraday’s Law - An _________________ current can be produced in a circuit by a
_________________________ magnetic field. Electromagnetic _______________
-moving a ______________ in and out of a coil of ______________ - causes
charges in the wire to move.
15.Electric Generator - converts ___________________ energy to ________________
energy by electromagnetic induction
16.Alternating Current (____) - For each ½ rotation of the ___________ loop, the
current produced by the generator _____________________ direction or alternates.
17.Electricity in Your Home - The electricity you use in your home is created by large
______________________ at the power plants. The ___________________energy
used to power the _____________________ can come from: Running water (dams),
burning coal, nuclear fission, wind, hot water (geothermal)
18.The ________________________ coming from a power plant is too strong for you
to use in your home.
19.Transformers - _______________ or __________________ the voltage so that it
can be used. Step up – _______________ voltage primary coil < secondary coil
Step down – _________________ voltage primary coil > secondary coil