Required Practical: Investigating I–V Characteristics (AQA GCSE Physics Combined Science): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the formula for calculating resistance?
What is the formula for calculating resistance?
Which components are needed in the circuit to investigate I-V characteristics?
Which components are needed in the circuit to investigate I-V characteristics?
Battery, ammeter, voltmeter, wire
In this practical, which variable is changed each time to measure resistance?
In this practical, which variable is changed each time to measure resistance?
Length of the wire
How does the resistance of a wire relate to its length?
How does the resistance of a wire relate to its length?
Directly proportional
What is a zero error reading?
What is a zero error reading?
A reading when value should be 0
How should zero error be corrected in resistance measurements?
How should zero error be corrected in resistance measurements?
Subtract zero error from all readings
What happens to resistance if the wire temperature increases?
What happens to resistance if the wire temperature increases?
Resistance increases
Why should a low P.D. be used in this experiment?
Why should a low P.D. be used in this experiment?
To keep current low, reducing heating
When should the current be turned on during the experiment?
When should the current be turned on during the experiment?
Only when taking a reading
What shape is the I-V characteristic graph for a resistor?
What shape is the I-V characteristic graph for a resistor?
Straight line
What is the key feature of a diode's I-V characteristic?
What is the key feature of a diode's I-V characteristic?
Current flows in one direction only
What happens to a filament bulb's resistance shown in its I-V curve?
What happens to a filament bulb's resistance shown in its I-V curve?
Resistance increases as temperature rises