Some students investigate the electrical resistance of different components using this circuit - Edexcel - GCSE Physics - Question 1 - 2012 - Paper 1
Question 1
Some students investigate the electrical resistance of different components using this circuit.
Which row of the table is correct for both meters P and Q?
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Worked Solution & Example Answer:Some students investigate the electrical resistance of different components using this circuit - Edexcel - GCSE Physics - Question 1 - 2012 - Paper 1
Step 1
Which row of the table is correct for both meters P and Q?
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Answer
Based on the function of the meters: Meter P, being placed in series with the component, is an ammeter, while Meter Q, parallel to the component, is a voltmeter. Therefore, the correct option is B: Meter P is an ammeter and Meter Q is a voltmeter.
Step 2
Calculate the voltmeter reading.
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Answer
To calculate the voltmeter reading, we can use Ohm's Law, which states:
V=IimesR
Here, the current (I) is 0.50 A, and the resistance (R) of the resistor is 12 ohms. Substituting the values:
