Circuit devices & IV Graphs (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does an IV graph show?
What does an IV graph show?
How current changes with voltage
What type of IV graph does a linear component have?
What type of IV graph does a linear component have?
A straight line through (0,0)
What does a steeper IV graph indicate about resistance?
What does a steeper IV graph indicate about resistance?
Lower resistance
How is resistance calculated from a linear IV graph?
How is resistance calculated from a linear IV graph?
Inverse of the gradient
What does a shallow slope on an IV graph indicate?
What does a shallow slope on an IV graph indicate?
Higher resistance
Which components have curved IV graphs?
Which components have curved IV graphs?
Filament lamp and diode
What happens to a filament lamp's resistance as current increases?
What happens to a filament lamp's resistance as current increases?
It increases
What shape does a filament lamp's IV graph have?
What shape does a filament lamp's IV graph have?
A curve that flattens at higher voltages
In which direction does a diode allow current to flow?
In which direction does a diode allow current to flow?
Only in one direction
What happens in a diode before the threshold voltage is reached?
What happens in a diode before the threshold voltage is reached?
No current flows
What happens to an LDR's resistance in bright light?
What happens to an LDR's resistance in bright light?
The resistance falls
What happens to a thermistor's resistance in hot conditions?
What happens to a thermistor's resistance in hot conditions?
The resistance drops