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# Unit 1 - How to answer this 9 mark question (AQA) watch

1. In the question paper for Jan 12
http://store.aqa.org.uk/qual/gce/pdf...1-QP-JAN12.PDF

A student is given a piece of metal wire and asked to investigate how the resistance of
the wire changes between a temperature of 0 oC and 100 oC.
5 (a) (i) Draw a labelled diagram of a suitable arrangement that would enable the student to
carry out the experiment
5 (a) (ii) Describe the procedure the student would follow in order to obtain accurate and reliable
measurements of the resistance of the wire at different temperatures between
0 oC and 100 oC.

However the markscheme
http://store.aqa.org.uk/qual/gce/pdf...W-MS-JAN12.PDF
doesn't help explain to me how the set up should be. I'm sort of stuck as to what i should draw. The only things i am sure of are an ammeter and a voltmeter. That's it. How do i draw this circuit?

Also for 5b the markscheme we put the wire in the water bath and ice and stir. Why would we do this?

2. Something like this

3. ok thanks, but is the circuit to draw just a wire?
4. (Original post by user1-4)
ok thanks, but is the circuit to draw just a wire?
The wire being tested can be drawn as a resistor. The rest of the circuit is as you suggested. The resistance could be measured with a basic voltmeter and ammeter circuit. (And power supply of course.)

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