Potential difference & resistance (Edexcel GCSE Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is potential difference in a circuit?
What is potential difference in a circuit?
The driving force causing charge flow
What unit is potential difference measured in?
What unit is potential difference measured in?
Volts (V)
Which instrument measures potential difference?
Which instrument measures potential difference?
Voltmeter
How must a voltmeter be connected to measure pd across a component?
How must a voltmeter be connected to measure pd across a component?
In parallel
What does resistance do to electrical charges in a circuit?
What does resistance do to electrical charges in a circuit?
Slows down the flow
What unit is resistance measured in?
What unit is resistance measured in?
Ohms (Ω)
Which equation relates potential difference, current and resistance?
Which equation relates potential difference, current and resistance?
If V and Ω, what is the current ?
If V and Ω, what is the current ?
0.4 A
What is the unit of energy transferred in a circuit?
What is the unit of energy transferred in a circuit?
Joules (J)
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 to electron flow as a resistor heats up?
What happens to electron flow as a resistor heats up?
It becomes harder for electrons to pass
How does a thermistor's resistance change as it warms up?
How does a thermistor's resistance change as it warms up?
Resistance decreases