Current, resistance and potential difference (AQA 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 is the unit of resistance?
What is the unit of resistance?
Ohms ()
What happens to current flow when resistance increases?
What happens to current flow when resistance increases?
It becomes harder for current to flow
What is another name for a variable resistor?
What is another name for a variable resistor?
Rheostat
Which device uses a variable resistor?
Which device uses a variable resistor?
Volume control on a radio
What does Ohm's law say about current and potential difference?
What does Ohm's law say about current and potential difference?
Current is directly proportional to p.d.
If voltage doubles, what happens to current (according to Ohm's law)?
If voltage doubles, what happens to current (according to Ohm's law)?
Current doubles
What is the p.d. across a resistor with and ?
What is the p.d. across a resistor with and ?
Which equation finds current from voltage and resistance?
Which equation finds current from voltage and resistance?
Which is an ohmic conductor?
Which is an ohmic conductor?
Fixed resistor
Which is a non-ohmic conductor?
Which is a non-ohmic conductor?
Light bulb filament
What shape is an I-V graph for an ohmic conductor?
What shape is an I-V graph for an ohmic conductor?
Straight line through origin
What does a steeper line on an I-V graph indicate?
What does a steeper line on an I-V graph indicate?
Lower resistance