Current electricity (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the formula for resistivity ?
What is the formula for resistivity ?
What does resistivity measure?
What does resistivity measure?
How well a material conducts electricity
How does the resistance of a metal conductor change as temperature rises?
How does the resistance of a metal conductor change as temperature rises?
Resistance increases
Why does metal resistance increase with temperature?
Why does metal resistance increase with temperature?
Atoms vibrate more, causing collisions
How does a thermistor's resistance change as temperature increases?
How does a thermistor's resistance change as temperature increases?
Resistance decreases
What is a common application of thermistors?
What is a common application of thermistors?
Temperature sensors in circuits
What is the resistivity of a superconductor below its critical temperature?
What is the resistivity of a superconductor below its critical temperature?
Zero
Which application uses superconductors for frictionless motion?
Which application uses superconductors for frictionless motion?
Magnetic levitation trains
How does resistance vary with temperature for metals compared to thermistors?
How does resistance vary with temperature for metals compared to thermistors?
Metals: increases; Thermistors: decreases
What happens to resistance at a superconductor's critical temperature?
What happens to resistance at a superconductor's critical temperature?
Sudden drop to zero