Current, Resistance & Potential Difference (OCR GCSE Physics A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
11 questions from this quiz
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Practise the questions
11 questions from this quiz
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 is the unit of measurement for potential difference?
What is the unit of measurement for potential difference?
Volts (V)
Which instrument is used to measure potential difference?
Which instrument is used to measure 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 with the component
What is the effect of resistance in a circuit?
What is the effect of resistance in a circuit?
Slows down flow of electrical charges
What is the unit of measurement for resistance?
What is the unit of measurement for resistance?
Ohms (Ω)
If pd across a resistor is , what is the current?
If pd across a resistor is , what is the current?
Which equation is used to calculate resistance from V and I?
Which equation is used to calculate resistance from V and I?
In the wire length experiment, what relationship exists between resistance and wire length?
In the wire length experiment, what relationship exists between resistance and wire length?
Directly proportional
What does the line of best fit show when plotting resistance vs wire length?
What does the line of best fit show when plotting resistance vs wire length?
Straight line through the origin
What else can be investigated besides wire length in this experiment?
What else can be investigated besides wire length in this experiment?
Resistors in series and parallel