Required Practical: Investigating I–V Characteristics (OCR GCSE Physics A (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 components are required for investigating I-V characteristics?
Which components are required for investigating I-V characteristics?
Battery, ammeter, voltmeter, wire
What is changed in the procedure to measure resistance?
What is changed in the procedure to measure resistance?
The length of the wire
What is the formula for resistance?
What is the formula for resistance?
How does resistance relate to wire length?
How does resistance relate to wire length?
Directly proportional
What is a zero error reading?
What is a zero error reading?
A reading on an instrument when the value should be zero
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 wire temperature increases?
What happens to resistance if wire temperature increases?
Resistance increases
How can heating effects be reduced during the investigation?
How can heating effects be reduced during the investigation?
Use a low P.D. to keep current low
What shape is the I-V characteristic for a resistor?
What shape is the I-V characteristic for a resistor?
Straight line
What does a straight-line I-V graph indicate?
What does a straight-line I-V graph indicate?
Ohm's law is obeyed
What is the key characteristic of a diode's I-V curve?
What is the key characteristic of a diode's I-V curve?
Current flows in one direction only
What happens to a filament bulb's resistance as temperature rises?
What happens to a filament bulb's resistance as temperature rises?
Resistance increases