2023 XMS PRELIM P3 MS

1 Created by Mr. Zhuang HY 4E Prelim 2023 Physics P3 Paper 3 Section A (20 marks) 1a W marked near the centre of line XY on Fig. 1.1, in line with line LM. [1] 1bi The larger the angle of rotation of the block, the larger the displacement from W. [1] 1bii The clockwise rotation of the block will displace the ray of light towards X, while the anticlockwise rotation of the block will displace the ray of light towards Y. * The results of both clockwise and anticlockwise rotations must be explicitly stated in the answer. [1] 1c As the block is rotated through large angles, the ray of light will pass through the short edges of the glass block instead of the long edges, thus (b) cannot be answered. [1] 1d correct constant (t he direction of rotation of the glass block , l ight ray should enter and exit only the long edges of the glass block , the spot on the glass block should always be directly above the spot S) [1] (*Any 1) correct independent variable (angle of rotation of the block about S,  ). [1] correct dependent variable (displacement of the ray from point W, d). [1] correct measurement and recording of d [1] (* averaging is not necessary) plots a suitable graph (d against  ). [1] sketch of the graph (linear graph that cuts through the origin with a positive gradient). [1] [6] Total [10] 2ai Ensure that the electronic balance does not have zero error. / TARE [1] 2aii mass measured to the nearest 0.1 g with unit. [1]

2 Created by Mr. Zhuang HY 2bi [1] for correct diagram [1] for correct labelling of diagram [2] 2bii d measured to the nearest 0.1 cm with unit and in range 3.1 cm to 3.5 cm [1] 2ci I measured to the nearest 0.1 cm with unit and in range 5.7 cm to 6.4 cm [1] 2cii Correct calculation of V with working and correct s.f. (2 s.f) and unit. [1] 2ciii The dry cell is not a regular cylinder. It has a small protruding part and l includes it. [1] As the length of the protruding part of the cell is very small compare to the length of the body of the cell, the estimate is a good one. [1] [2] 2civ The volume of the main body of the cell and the protruding part can be measured separately. The sum of the two volumes will be the total volume of the cell. [1] Total [10] Paper 3 Section B (20 marks) 3a I measured to the nearest 0.01 A with unit and in range 0.32 A to 0.36 A. [1] 3b V measured to the nearest 0.05 V with unit and in range 0.19 V to 0.21 V. [1] Ruler Set square Set square d Dry cell

3 Created by Mr. Zhuang HY 3c 10 sets of data with correct trend, x increases, V increases. [1] Table with quantities x and V with correct units. [1] All values of x to 1 d.p. [1] All values of V to 2 d.p. [1] e.g x/cm V/V 10.0 0.20 15.0 0.30 25.0 0.40 35.0 0.60 45.0 0.70 60.0 2.05 65.0 2.15 75.0 2.30 85.0 2.40 90.0 2.50 [4]

4 Created by Mr. Zhuang HY 3d Correct Axes [1] Correct Scale [1] Correct Points [1] 2 x Correct Best Fit Lines [1] E.g. [4]