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    I'm doing edexcel and In Physics unit 3 there is usually a big question of around 13-14 marks which has a part 'For two of these quantities explain your choice of measuring instrument'.
    How are we supposed to attempt it? In terms of uncertainty,Precision and such.Can someone guide me about what to write for some instruments? Like ammeter and voltmeter,They ask for a 'suitable range',How are we supposed to write that?
    Lastly,Can someone explain these? It was in the MS of IAL Jan. 2014
    mass – weighing machine,
    comment on scale related to expected mass
    height – metre rule,
    adequate range with 1 mm divisions with reference to
    height be measured
    time – stopwatch,
    reading to 0.1 s with reference to reaction
    time or percentage uncertainty
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