I–V Graphs (OCR GCSE Physics A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
10 questions from this quiz
In an I-V graph, what is plotted on the y-axis?
In an I-V graph, what is plotted on the y-axis?
Current
In an I-V graph, what is plotted on the x-axis?
In an I-V graph, what is plotted on the x-axis?
Potential difference
What does the gradient of an I-V graph represent?
What does the gradient of an I-V graph represent?
Resistance
Which formula is used to calculate resistance?
Which formula is used to calculate resistance?
What is the I-V graph shape for an ohmic resistor?
What is the I-V graph shape for an ohmic resistor?
Straight line through origin
What does 'directly proportional' mean for an ohmic resistor?
What does 'directly proportional' mean for an ohmic resistor?
and increase at same rate
Why does resistance increase in non-ohmic resistors when current increases?
Why does resistance increase in non-ohmic resistors when current increases?
Metal atoms vibrate when wire heats
Which component is an example of a non-ohmic resistor?
Which component is an example of a non-ohmic resistor?
Lamp
In how many directions can a diode allow current to flow?
In how many directions can a diode allow current to flow?
One direction only
What happens to a diode's resistance above the threshold voltage?
What happens to a diode's resistance above the threshold voltage?
Resistance drops rapidly