Potential difference & resistance (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What unit is potential difference measured in?
What unit is potential difference measured in?
Volts ()
How must a voltmeter be connected to measure potential difference across a component?
How must a voltmeter be connected to measure potential difference across a component?
In parallel
What is the role of potential difference in a circuit?
What is the role of potential difference in a circuit?
Driving force causing charges to flow
What unit is resistance measured in?
What unit is resistance measured in?
Ohms ()
What does resistance do to electrical charges in a circuit?
What does resistance do to electrical charges in a circuit?
Slows down their flow
A resistor has resistance and current flows. What is the pd across it?
A resistor has resistance and current flows. What is the pd across it?
Which formula gives current when pd and resistance are known?
Which formula gives current when pd and resistance are known?
What happens when electrons collide with ions in a resistor?
What happens when electrons collide with ions in a resistor?
Ions vibrate and heat up
What happens as a resistor heats up?
What happens as a resistor heats up?
Harder for electrons to pass through
How does a thermistor's resistance change as it warms up?
How does a thermistor's resistance change as it warms up?
Decreases