A second full 40-mark Paper 032 style practice paper with three questions — specific heat capacity, series and parallel circuits, and a dice model of radioactive decay.
4 narrated scenes. Press play, listen and read along — the points appear as they are explained. Use ‹ Prev / Next › or the scene bar to jump to any scene.
Heat, circuits and decay: three more required practicals, written as exam questions. Aim for every skill mark and every precaution.
Narration uses your device’s built-in voice. No sound? Switch to “Captions only” — the captions advance on their own.
Copy these into your notebook in your own words — that is how they stick.
3 questions; 40 marks: Q1 14, Q2 13, Q3 13.
E = VIt; c = E ÷ (m Δθ); heat loss makes c too large.
Parallel: I = I₁ + I₂; series: V = V₁ + V₂.
R = V ÷ I.
Dice remaining vs throw number: exponential curve; half-life from the graph.
Dice model fits random decay: cannot predict which, can predict the many.
[XS] 30 + [UK] 10.
Tick each point earned.
8 items modelled on real CSEC Paper 1 questions. Choose one answer for each, then check. Aim for 80% or better. Work each item on paper first.
Write full answers, then reveal the mark scheme and tick the points you earned (40 marks in total). Show all your working — method marks count. Your answers are saved on this device.
Question 1 [14 marks]
A student determines the specific heat capacity of a 0.50 kg aluminium block using a 12 V heater carrying a current of 5.0 A. The block is heated for 300 s and its temperature rises from 22.0 °C to 62.0 °C.
(a) (a) Describe how the student should carry out the experiment. [6]
(b) (b) Draw a table with suitable headings and units for the results. [3]
(c) (c) State the three quantities used to calculate the electrical energy supplied. [1]
(d) (d) Calculate the specific heat capacity of aluminium. [2]
(e) (e) State the effect of heat loss to the surroundings on the calculated value, and why. [2]
Question 2 [13 marks]
A student sets up two identical lamps first in series and then in parallel. In the series circuit the current is 0.30 A, the p.d. across lamp 1 is 2.0 V and across lamp 2 is 4.0 V, and the supply is 6.0 V. In the parallel circuit the current in the branches is 0.50 A and 0.25 A.
(a) (a) Describe how the student should set up the circuits and take the readings. [5]
(b) (b) Draw a table to record the currents and p.d.s for the parallel circuit. [3]
(c) (c) Compare the results to state how the p.d.s add in series and the currents add in parallel. [2]
(d) (d) Calculate the resistance of lamp 2 in the series circuit. [2]
(e) (e) State one reason why household appliances are connected in parallel. [1]
Question 3 [13 marks]
A student models radioactive decay with 100 dice. Each throw, dice showing a six are removed. The number of dice remaining after throws 0, 1, 2, 3, 4, 5, 6 is 100, 84, 70, 58, 49, 41, 34.
(a) (a) Describe the procedure. [5]
(b) (b) Draw a table for the results. [3]
(c) (c) Describe the graph that should be plotted and its shape. [2]
(d) (d) Use the data to find the “half-life” in throws. [2]
(e) (e) Explain why this model is suitable for radioactive decay. [1]
Everything in this lesson is based on these parts of the CXC syllabus and papers.