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Figure 1 shows some of the apparatus that students use to determine the resistance of a piece of iron wire - Edexcel - GCSE Physics Combined Science - Question 1 - 2023 - Paper 2
Question 1
Figure 1 shows some of the apparatus that students use to determine the resistance of a piece of iron wire. (a) Add connecting wires, a voltmeter and an ammeter to ... show full transcript
Worked Solution & Example Answer:Figure 1 shows some of the apparatus that students use to determine the resistance of a piece of iron wire - Edexcel - GCSE Physics Combined Science - Question 1 - 2023 - Paper 2
Step 1
Add connecting wires, a voltmeter and an ammeter
Answer
To complete the circuit in Figure 1, you would need to connect the voltmeter in parallel with the iron wire and the ammeter in series with the iron wire. This setup allows for the measurement of voltage across the iron wire and the current flowing through it, enabling the calculation of resistance using Ohm's Law, which states that resistance (R) can be calculated as:
where V is the voltage across the wire and I is the current through the wire.
Step 2
Give the name of one additional piece of apparatus the students would need.
Answer
One additional piece of apparatus the students would need is a measuring tape or ruler. This will allow them to accurately measure the length of the iron wire as they investigate how the resistance changes with length.