Download 6.P.3A.4 Notes

Energy Transfer and Conversation Study Guide 4 of 8 (8/22 – 10/10)
Name ______________________________________________ Date __________________ Unit Test on 10/12/2016
Performance Indicator 6.P.3A.4
Develop and use models to exemplify how magnetic fields produced by electrical energy flow in a circuit
is interrelated in electromagnets, generators, and simple electrical motors.
Magnetism
1. What is magnetism? magnetism is the force of attraction or repulsion of magnetic materials.
2. What surrounds a magnet? magnetic field that applies a force, a push or pull, without actually
touching an object
3. True or False. Evidence of a magnetic field can be found in how the field affects magnetic materials
(including, but not limited to, a compass, iron filings, and paper clips).
4. An electric current flowing through a wire wrapped around an iron core forms a magnet.
5. A coil of wire spinning around a magnet or a magnet spinning around a coil of wire can form an
electric current.
Interrelationship Between Magnetism and Electricity
Electromagnets
6. An electromagnet is formed when a wire in an electric circuit is wrapped around an iron core
producing a magnetic field.
7. The magnet that results loses its magnetism if the electric current stops flowing.
Generators
8. A generator produces an electric current when a coil of wire wrapped around an iron core is rotated
near a magnet.
9. Generators at power plants produce electric energy for our homes.
10. A generator contains coils of wire that are stationary, and rotating magnets are rotated by turbines.
11. Turbines are huge wheels that rotate when pushed by water, wind, or steam.
12. Thus mechanical energy is changed to electrical energy by a generator. Smaller generators may be
powered by gasoline.
Simple Electric Motors
13. An electric motor changes electrical energy to mechanical energy.
14. It contains an electromagnet that rotates between the poles of a magnet.
15. The coil of the electromagnet is connected to a battery or other source of electric current.
16. When an electric current flows through the wire in the electromagnet, a magnetic field is produced in
the coil.
17. Like poles of the magnets repel and unlike poles of the magnets attract.
18. This causes the coil to rotate and thus changes electrical energy to mechanical energy.
19. This rotating coil of wire can be attached to a shaft and a blade in an electric fan.
Energy Transfer and Conversation Study Guide 4 of 8 (8/22 – 10/10)
Name ______________________________________________ Date __________________ Unit Test on 10/12/2016
Performance Indicator 6.P.3A.4
Develop and use models to exemplify how magnetic fields produced by electrical energy flow in a circuit
is interrelated in electromagnets, generators, and simple electrical motors.
Magnetism
1. What is magnetism?
2. What surrounds a magnet?
3. True or False. Evidence of a magnetic field can be found in how the field affects magnetic materials
(including, but not limited to, a compass, iron filings, and paper clips).
4. An electric ___________ flowing through a wire wrapped around an iron core forms a ____________.
5. A coil of wire spinning around a _____________ or a magnet spinning around a coil of ___________
can form an electric _____________.
Interrelationship Between Magnetism and Electricity
Electromagnets
6. An _____________ is formed when a wire in an electric circuit is wrapped around an iron core
producing a magnetic field.
7. The magnet that results loses its magnetism if the electric current _____________ flowing.
Generators
8. A _____________ produces an electric current when a coil of wire wrapped around an iron core is
rotated near a magnet.
9. Generators at power plants produce _____________ energy for our _____________.
10. A generator contains coils of wire that are _____________, and rotating _____________ are rotated
by turbines.
11. _____________ are huge wheels that rotate when pushed by water, wind, or steam.
12. Thus mechanical energy is changed to _____________ energy by a generator. Smaller generators
may be powered by _____________.
Simple Electric Motors
13. An electric motor changes electrical energy to _____________ energy.
14. It contains an _____________ that rotates between the poles of a magnet.
15. The coil of the electromagnet is connected to a _____________ or other source of electric current.
16. When an electric current flows through the wire in the electromagnet, a magnetic _____________ is
produced in the coil.
17. Like poles of the magnets _____________ and unlike poles of the magnets _____________.
18. This causes the coil to _____________ and thus changes electrical energy to mechanical energy.
19. This rotating coil of wire can be attached to a _____________ and a blade in an electric
_____________.