Required Practical: Investigating I–V Characteristics (OCR GCSE Physics A, Combined (Gateway Science Suite)): 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
Which component measures current in the I-V characteristics practical circuit?
Which component measures current in the I-V characteristics practical circuit?
Ammeter
What is changed to investigate how resistance varies in the wire practical?
What is changed to investigate how resistance varies in the wire practical?
Length of the wire
What is the formula for calculating resistance?
What is the formula for calculating resistance?
How does resistance relate to wire length in this practical?
How does resistance relate to wire length in this practical?
Directly proportional
What type of error is a zero error reading?
What type of error is a zero error reading?
Systematic error
How should zero error be handled in resistance measurements?
How should zero error be handled in resistance measurements?
Subtract it from all readings
What happens to resistance if wire temperature increases?
What happens to resistance if wire temperature increases?
Resistance increases
Why use a low P.D. in this practical?
Why use a low P.D. in this practical?
Keeps current low, reducing heating
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 does a straight-line I-V graph for a resistor indicate?
What does a straight-line I-V graph for a resistor indicate?
Ohm's law is obeyed
What I-V characteristic does a diode show?
What I-V characteristic does a diode show?
Current flows in one direction only
What must be done before making changes to the circuit?
What must be done before making changes to the circuit?
Switch off the circuit