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Questions and Answers
What makes carbon the most suitable material for a rubbing connection with commutators or slip rings?
What makes carbon the most suitable material for a rubbing connection with commutators or slip rings?
- Its high electrical conductivity
- Its resistance being 2000–3000 times that of copper
- Its self-lubricating quality (correct)
- Its low cost
What is the overall charge of an atom that has gained an electron?
What is the overall charge of an atom that has gained an electron?
- Neutral
- Double ion
- Negative ion (correct)
- Positive ion
In a liquid, what moves in opposite directions?
In a liquid, what moves in opposite directions?
- Molecules
- Negatively charged ions
- Ions
- Positively charged ions and Negatively charged ions (correct)
Which type of solution is able to conduct electricity most strongly?
Which type of solution is able to conduct electricity most strongly?
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What type of substances are known as electrolytes?
What type of substances are known as electrolytes?
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Which type of solution is unable to conduct electricity?
Which type of solution is unable to conduct electricity?
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What is the main reason that makes a material a good conductor of electricity?
What is the main reason that makes a material a good conductor of electricity?
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What happens when a positive force is applied to a copper atom?
What happens when a positive force is applied to a copper atom?
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How do insulators affect the flow of electrons?
How do insulators affect the flow of electrons?
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What characteristic of copper makes it the most commonly used conductor?
What characteristic of copper makes it the most commonly used conductor?
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