Download Unit 5: Electromagnets, Generators, Motors What is an

Unit 5: Electromagnets, Generators, Motors
1. What is an electromagnet
It’s a temporary magnet caused
_by a current flowing around a
metal core, usually iron
a. The 3 parts to an electromagnet
1._metal iron core
__________________________
2._solenoid_________________
________
3._power source
2. What is a solenoid?
__a coil of wire looped around in
___helix____________________
________________________
a. Ways to increase the strength
of the magnetic field of a solenoid
1.__increase number of loops
2._increase the current running
___through the loops
3.__put an iron core in the center
_to create an electromagnet
b. Which is stronger?
A) a solenoid with 1 loop or
B) a solenoid with 15 loops?
A) a solenoid with 300 loops or
B) a solenoid with 250 loops?
A) a solenoid with a current of 1A
B) a solenoid with a current of
10A?
A) a solenoid with a current of
0.1A
B) a solenoid with a current of
0.5A?
c. a solenoid with an iron core is known as
___electromagnet__________
__________________________
3. What’s an electromagnet?
___it’s a temporary magnet
__caused by a current flowing
through a wire wrapped around
a metal core
a. Electromagnet Quick Facts
1._some very large
_electromagnets are strong
enough to raise trains.
2._you can turn it on or off by
turning the current on or
off.________________________
3._you can increase the strength
by adding loops to the
solenoid____________________
4.__it’s made of an iron core and
a current carrying solenoid
_________________
_________Motors
-
Uses electrical energy and
transforms it into mechanical
energy
Generators_______
- uses mechanical energy and transforms
into electrical energy
Possible Questions for Study guide:
1. What is an electromagnet?
2. What is a solenoid?
3. What are the ways you can increase the magnetic field around a solenoid?
4. What are some quick facts about electromagnets?
5. What is a magnet?
6. Where is the strongest part of the magnet?
7. What is a temporary magnet?
8. What is a magnetic field?
9. What is a motor? Include examples
10. What is a generator? Include examples
11. How does the law of electric charges apply to magnetism?
12. What is Ohm’s Law? The formula and definition
13. What is current? What is the unit for current?
14. What is voltage? What is the unit for voltage?
15. What is resistance? What is the unit for resistance?
16. What is transferring anytime you “charge” an object?