(e) The position of the eye must be perpendicular to the scale reading of 1 ruler/thermometer// Repeat the experiment to get the average value Total 16 Question Answer Mark Total Mark 2 (a)(i) R is directly proportional to L 1 1 Extrapolate the graph 1 (ii) Show on the graph when R= 2.75 1 3 Ω, L = 75 cm 1 The gradient of graph R against L Draw a big triangle (5 X 4 blocks) 1 1 q = 2.5 0.0 – Ω 70.0 0.0 cm – (iii) 3 1 = 0.0357 cm-1 Ω and unit) 1 Use R/L = 0.0357 cm-1 Ω (b)(i) 3 = 0.79 (0.046)2 (0.0357) 1 = 0.0000597 cm Ω 1 (ii) Decreases 1 1 (c) The position of the eye is perpendicular to the scale of metre rule. 1 1 Total 16
(e) The position of the eye must be perpendicular to the scale reading of ruler/thermometer// Repeat the experiment to get the average value 1 Total 16 Question Answer Mark Total Mark 2 (a)(i) R is directly proportional to L 1 1 (ii) Extrapolate the graph Show on the graph when R= 2.75 Ω, L = 75 cm 1 1 1 3 (iii) The gradient of graph R against L Draw a big triangle (5 X 4 blocks) q = 2.5 – 0.0 Ω 70.0 – 0.0 cm = 0.0357 Ω cm-1 1 1 1 and unit) 3 (b)(i) Use R/L = 0.0357 Ω cm-1 = 0.79 (0.046)2 (0.0357) = 0.0000597 Ω cm 1 1 1 3 (ii) Decreases 1 1 (c) The position of the eye is perpendicular to the scale of metre rule. 1 1 Total 16
PHYSICS-3-TRIAL-SPM-SBP-7-July-2017-Marking-Scheme-1.docx