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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?
What type of materials are commonly used to make resistors?
What type of materials are commonly used to make resistors?
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?
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?
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?
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?
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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