Physics (AS & A Level) · May / June 2021 · Paper 52 · Question 1

A student investigates the heating of a solid metal cylinder. Fig. 1.1 shows the cylinder of cross‑sectional area A and height h. h A cylinder Fig. 1.1 The student places the cylinder and an electrical heater in a beaker of water. The electrical heater is switched on and the student measures the time t for the temperature of the water to increase by Δθ. A number of cylinders of the same material but with different cross‑sectional areas are available. It is suggested that the relationship between t and A is Pt = AhWΔθ + ZΔθ where P is the power of the heater and W and Z are constants. Design a laboratory experiment to test the relationship between t and A. Explain how your results could be used to determine values for W and Z. You should draw a diagram, on page 3, showing the arrangement of your equipment. In your account you should pay particular attention to: ● the procedure to be followed ● the measurements to be taken ● the control of variables ● the analysis of the data ● any safety precautions to be taken. 3 Diagram 4 [15]

Read automatically from the paper; the printed page above is exact.