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CAPE Physics Unit 1 · 2005 · Paper 2 · Question 3(a)

Instruments were used in an electrical method to determine the specific heat capacity of a metal using the equation VIt = mc Δθ. The metal sample was a cylinder with holes for a heater and thermometer. The instruments used were a moving coil voltmeter (0-10 V, smallest division 0.2 V), a moving coil ammeter (0-5 A, smallest division 0.1 A), a stop clock (smallest division 0.01 s), a balance (0-1000 g, smallest division 10 g), and a mercury thermometer (smallest division 1°C).

Complete Table 3 to show the estimated uncertainty (random error) in EACH measurement.

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Other parts of this question

  1. 3(b)Calculate the value of the specific heat capacity given by this experiment TOGETHER with the uncertainty in the value.[4 marks]
  2. 3(c)Suggest TWO ways in which the systematic error in this experiment could be reduced.[2 marks]

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