Physics (AS & A Level) · Oct / Nov 2024 · Paper 52 · Question 1

Fig. 1.1 shows a coil made from resistance wire. Fig. 1.1 The coil is placed in cooking oil of mass m. The total length of the resistance wire in the oil is L. A potential difference V is applied to the coil. The temperature of the oil increases by Δθ in time t. It is suggested that Δθ is related to L by the relationship AtV 2 L = mKΔθ + Z where A is the cross-sectional area of the wire, and K and Z are constants. Plan a laboratory experiment to test the relationship between Δθ and L. Draw a diagram showing the arrangement of your equipment. Explain how the results could be used to determine values for K and Z. In your plan you should include: ● 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.