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Questions and Answers
What is the function of resistors in an electrical circuit?
What is the function of resistors in an electrical circuit?
- They increase voltage
- They generate electrical energy
- They control current flow (correct)
- They decrease electrical resistance
What happens to resistance when the electrical resistance value of a resistor is increased?
What happens to resistance when the electrical resistance value of a resistor is increased?
- The current flow decreases (correct)
- The voltage increases
- The current flow increases
- The voltage decreases
What is the role of semiconductors in electronic circuits?
What is the role of semiconductors in electronic circuits?
- They conduct electricity better than conductors
- They are used to reduce resistance loss in long-distance electrical lines
- They are used to generate heat
- They have special properties and are important in electronic circuits (correct)
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Study Notes
- Resistors are electrical components that control current flow.
- They can be manufactured to have specific values of electrical resistance.
- The higher the resistance, the more difficult it is for current to flow.
- Resistance converts electrical energy into heat.
- Semiconductors are materials that conduct electricity, but not as well as conductors.
- Semiconductors have special properties and can be doped with impurities.
- Electrical conduction in semiconductors is always a result of the motion of electrons or holes.
- Holes are a shortage of an electron and move in the opposite direction of electrons.
- Thick wires and high voltages reduce resistance loss in long-distance electrical lines.
- Semiconductors are important in electronic circuits.
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