Resistors (AQA GCSE Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What type of conductor has constant resistance and a linear current-P.D. graph?
What type of conductor has constant resistance and a linear current-P.D. graph?
Ohmic conductor
Which components have non-constant resistance that changes with current?
Which components have non-constant resistance that changes with current?
Lamps, diodes, thermistors and LDRs
What happens to a filament lamp's resistance as its temperature increases?
What happens to a filament lamp's resistance as its temperature increases?
Resistance increases
In which direction does current flow through a diode?
In which direction does current flow through a diode?
One direction only
What does an LED do when current flows through it?
What does an LED do when current flows through it?
Gives off light
What is a key advantage of LEDs as a light source?
What is a key advantage of LEDs as a light source?
Extremely energy-efficient
How does a thermistor's resistance change in hotter temperatures?
How does a thermistor's resistance change in hotter temperatures?
Resistance is lower
What happens to an LDR's resistance when light intensity increases?
What happens to an LDR's resistance when light intensity increases?
Resistance is lower
How does wire length affect resistance and current?
How does wire length affect resistance and current?
Longer = more resistance, lower current
Why does resistance increase when electrons flow through a resistor at higher currents?
Why does resistance increase when electrons flow through a resistor at higher currents?
Atoms vibrate more after collisions
In Ohm's Law, what is the relationship between current and P.D. for an ohmic conductor?
In Ohm's Law, what is the relationship between current and P.D. for an ohmic conductor?
Directly proportional
What is the resistance like for a diode in the reverse direction?
What is the resistance like for a diode in the reverse direction?
Very high resistance