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Questions and Answers
What happens to the electrons in a conductor with no voltage applied?
What happens to the electrons in a conductor with no voltage applied?
- They have almost no resistance to electron flow.
- They flow towards the positive terminal of the voltage source.
- They resist movement due to being tightly bound to nuclei.
- They drift away from the nuclei but do not flow in any one direction. (correct)
Who discovered superconductivity in 1911?
Who discovered superconductivity in 1911?
- Heike Kamerlingh Onnes (correct)
- Marie Curie
- Thomas Edison
- Albert Einstein
What is the main function of a resistor in an electric circuit?
What is the main function of a resistor in an electric circuit?
- To prevent any current from flowing
- To allow electric current to pass with little resistance
- To provide no resistance to current flow
- To limit the amount of current that flows through it (correct)
How is resistance typically measured?
How is resistance typically measured?
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What type of materials are commonly used to make resistors?
What type of materials are commonly used to make resistors?
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What happens to the resistance in a circuit if components are added in a series?
What happens to the resistance in a circuit if components are added in a series?
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What is the function of a variable resistor or rheostat in a circuit?
What is the function of a variable resistor or rheostat in a circuit?
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According to Ohm's law, what is the relationship between current and voltage?
According to Ohm's law, what is the relationship between current and voltage?
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What happens to the brightness of light bulbs in a series circuit if an extra bulb is added?
What happens to the brightness of light bulbs in a series circuit if an extra bulb is added?
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What characteristic is shared by flowing water and flowing electricity as mentioned in the text?
What characteristic is shared by flowing water and flowing electricity as mentioned in the text?
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