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PS - Chapter 11
Physical Science
| Question | Answer |
|---|---|
| Magnetic objects always have a _____________ and ________________ magnetic pole. | north and south |
| The north and south magnetic poles are called: | magnetic dipoles |
| What has teh strange ability to attract and hold iron pieces: | iodestones |
| When a magnet is divided, does it keep both the north and south magnetic poles? | yes |
| What type of force is magnetism? | a field force |
| How can you model a magnetice field? | By using magnetic lines of force, which are similar to an electir field's lines of force. |
| Magnetice lines of force are ________________ loops. | continuous |
| The direction of the field line is determined by: | the direction a tiny compass would point. |
| Magnetic field lines point ________________ from north magentic poles and toward _________________ magnetic poles. | away, south |
| The distance between field lines indicate: | strength of the field at that point |
| _________________ magnetic poles attract | opposite |
| _________________ magnetic poles repel | like |
| Magnets _________________ attract ferromagnetic materials. | stongly |
| Some materials are only ________________ attracted to magnets. | slightly |
| Materials that are only slightly attracted to magents are ________________________. | paramagnetic |
| Large groups of magnetic dipoles automatically align in the same direction to form microsopic regions called | domains |
| In unmagnetized ferromagnetic materials the magnetic directions of the ______________ are oriented ________________, so their magnetic forces _____________________ each other. | domains, randomly, cancel |
| When an external magentic field is applied the domains ____________________ to form a permanent magnet. | align |
| The atoms of paramagnetic materials don't reside in ___________________ and are _______________ oriented. | domains, randomly |
| Particle motion __________________ with temperature. | Increases |
| The temperature at which a material will abruptly lose its ferromagnetic properties is teh ___________________ _______________. | Curie temperature |
| Conventional electrical current flows in the ____________________ direction from electrons. | opposite |
| What is a solenoid? | a coil of wire that acts like a magnet |
| A solenoid with a bar magent inserted in the middle makes an ________________________. | electromagnet |
| Electric current produces a __________ __________. | magnetic field |
| A ___________ ______________ produces a electrical current. | magnetic field |
| When the magnet stops moving, the ______________ stops. | current |
| Sliding the wire coil along teh magnet has the same effect as _______________. | moving the magnet |
| What increases the amount of current produced? | Number of coils or the speed of motion |
| If the magnetic field is unchanging, then ___ ______ is produced. | no current |
| Electrical genreators convert __________________ mechanical energy into ______________ energy. | rotational, electrical |
| In a generator, some type of ____________ ______________ such as a steam turbine or engine, rotates a shaft attached to one or more pairs of strong magnents. | prime mover |
| ________________________ is producesd by the generators. | alternating currents |
| A ______________ is a machine that converts the energy of a moving fluid into rotational motion. | turbine |
| Generators convert _________________ to electrical energy using rotating magnets. | mechanical energy |
| Motors are machines that convert electrical energy into ________________________________. | rotary mechanical energy |
Created by:
ashley.baldwin
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