Concepts for Advanced Electrical Quiz
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Question 1 of 10
1. Question
1. What does it mean when there is an absence of free electrons?
Hint
The absence of the free electrons means that electrical current cannot be conducted through the material.
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Question 2 of 10
2. Question
2. What materials make the best conductors?
Hint
The best conductors are silver, copper, gold, and aluminum.
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Question 3 of 10
3. Question
3. What is dynamic electricity?
Hint
Electricity is often described as being either static or dynamic. The difference between the two is based simply on whether the electrons are at rest (static) or in motion (dynamic).
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Question 4 of 10
4. Question
4. True or False? All electrons possess a positive charge.
Hint
False. The end that frees more electrons develops a positive charge and the other end develops a negative charge. If a wire is attached from one end of the battery to the other, electrons flow through the wire to balance the electrical charge.
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Question 5 of 10
5. Question
5. What is a field of force that exists around a charged body?
Hint
A field of force exists around a charged body. This field is an electrostatic field (sometimes called a dielectric field) and is represented by lines extending in all directions from the charged body and terminating where there is an equal and opposite charge.
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Question 6 of 10
6. Question
6. What kind of precautions should be taken when working with electronic components?
Hint
All of the above.
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Question 7 of 10
7. Question
7. True or False? When a magnetizing force is applied to a piece of magnetic material, a point is reached where no more lines of force can be induced or introduced.
Hint
True. When a magnetizing force is applied to a piece of magnetic material, a point is reached where no more lines of force can be induced or introduced.
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Question 8 of 10
8. Question
8. Which materials have a high permeability, the measure of the ease with which a magnetic flux can penetrate a material?
Hint
Materials such as soft iron and other ferrous metals are said to have a high permeability,
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Question 9 of 10
9. Question
9. What is retentivity?
Hint
The ability of a magnet to hold its magnetism varies greatly with the type of metal and is known as retentivity. Magnets made of soft iron are very easily magnetized but quickly lose most of their magnetism when the external magnetizing force is removed. The small amount of magnetism remaining, called residual magnetism, is of great importance in such electrical applications as generator operation.
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Question 10 of 10
10. Question
10. ________ in motion make up an electric current.
Hint
Electrons in motion make up an electric current.