Term
Yes or No
Power substations include collections of step-down transformers. |
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Definition
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Term
Yes or No
At the geographic North Pole, a compass will point south. |
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Definition
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Term
Yes or No
The magnetism of lodestones is actually the net result of two kinds of magnetism. |
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Definition
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Term
Yes or No
Natural magnets, such as lodestones, display ferrimagnetism. |
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Definition
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Term
Yes or No
Magnets strongly attract all metals. |
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Definition
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Term
Yes or No
The strongest magnets are made out of pure substances. |
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Definition
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Term
Yes or No
It is possible for a magnet to have only one pole. |
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Definition
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Term
Yes or No
Magnetic fields interact with each other just like electric fields. |
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Definition
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Term
Yes or No
William Gilbert was the first person to experiment with magnets. |
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Definition
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Term
Yes or No
The first practical use of natural magnets was navigation. |
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Definition
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Term
Yes or No
In the Middle Ages magnets were thought to be dangerous to one's health. |
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Definition
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Term
| Special electrical switches that use electromagnets are called... |
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Definition
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Term
| Why do power companies use transformers? |
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Definition
| Power companies use transformers to conserve energy and provide a usable voltage of electricity to homes. |
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Term
| A devide that delivers current from one circuit to another through electromagnetic induction is called a(n)... |
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Definition
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Term
| Current that flows in only one direction is called... |
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Definition
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Term
| State the law of magnetism. |
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Definition
| Opposite magnetic poles attract, and like magnetic poles repel. |
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Term
| The strength and direction of magnetic fields are modeled by... |
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Definition
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Term
| Areas of concentrated magnetic force are called... |
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Definition
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Term
| Who were the first people to use magnetic compasses? |
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Definition
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Term
Which of the following is a step-up transformer?
-first coil--9 wraps; second coil--3 wraps
-first coil--8 wraps; second coil--7 wraps
-first coil--7 wraps; second coil--8 wraps
-first coil--6 wraps; second coil--6 wraps |
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Definition
| First coil--7 wraps; second coil--8 wraps |
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Term
| Geothermal energy generation uses what kind of turbine? |
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Definition
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Term
| Nuclear energy generation uses what kind of turbine? |
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Definition
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Term
| Most of the electricity we use in our homes is supplied by a(n)... |
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Definition
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Term
Which of the following does not use electromagnets?
-maglev trains
-door bells
-AC generators
-magnetic compasses |
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Definition
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Term
| Devices that convert mechanical energy into electrical energy are called... |
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Definition
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Term
| Who changed the study of magnetism from superstition to science? |
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Definition
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Term
| What is the difference between the geographic and magnetic poles on earth? |
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Definition
| The geographic poles are at the axes of the earth's spin where all lines of longitude intersect. The magnetic poles are where the earth's concentrated magnetic field lines are vertical. The yare not at the same location. The geographic poles are fixed, but the magnetic poles are drifting. |
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