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4 marksPower, P

CSEC Physics · January 2017 · Paper 2 · Question 1(f)

Given that the power supplied to the immersion heater was kept constant at 40 W, calculate the time taken for 18.0 kJ of energy to be supplied.

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  1. 1(a)On the grid provided on page 5, plot the graph of electrical energy, E, against temperature rise, ΔΤ.[8 marks]
  2. 1(b)Using your graph, calculate the slope, S, of the graph.[5 marks]
  3. 1(c)What physical quantity does the slope represent?[1 mark]
  4. 1(d)Use the value of the slope S, calculated in 1 (b) on page 4, to determine the specific heat capacity of the liquid in the units Jg⁻¹k⁻¹. Assume there is…[4 marks]
  5. 1(e)(i)How does this procedure help in minimizing error in the experiment?[2 marks]
  6. 1(e)(ii)State ONE other useful precaution that the student should have taken.[1 mark]

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