SAJC_H1_PHY_P2

1 SAJC 2016 Preliminary Examinations / 8866 [Turn Over Class Index Number Name 15 ST. ANDREW’S JUNIOR COLLEGE JC 2 2016 Preliminary Examination Paper 2 PHYSICS, Higher 1 8866/02 13 th Sept 2016 2 hours READ THESE INSTRUCTIONS FIRST Write your name, index number and Civics Group on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid.. Section A Answer all questions. Section B Answer any two questions. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use Paper 1 / 30 Paper 2 Section A / 40 Section B / 40 Total / 110 Percentage / 100 Grade This question paper consists of 24 printed pages including this page.

2 SAJC 2016 Preliminary Examinations / 8866 [Turn Over

3 SAJC 2016 Preliminary Examinations / 8866 [Turn Over Section A – Answer all questions in the space provided 1 (a) Fig. 1.1 Fig 1.1 is a circuit with a 25.0 V e.m.f. source that has negligible internal resistance. Switch Z is closed. (i) Show that the total effective resistance of the circuit is 12.9 . [2] (ii) Calculate the potential difference between points A and B. potential difference =…………………………V [2] (iii) State and explain how the total power dissipated would change when switch Z is left open. ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… …………………………………………………………………………………... [2] switch Z

4 SAJC 2016 Preliminary Examinations / 8866 [Turn Over 2 The graph of Fig. 2.1 shows how g, the acceleration due to gravity, varies with r, the distance from the centre of the Earth. Fig. 2.1 (a) Calculate the gradient of the graph. gradient = ……………..….…. [1] (b) State what can be inferred from the gradient of the graph calculated in (i) with regards to g and r. …………....…….……………………………………………………………………… [1]

5 SAJC 2016 Preliminary Examinations / 8866 [Turn Over 3 (a) In Fig. 3.1, there is a solenoid that causes a magnetic field of flux density, B, in the direction as shown. Describe an experiment to show how the force on a current- carrying conductor can be used to measure this magnetic flux density, B, using a current balance. Derive the expression for B. Use a diagram to support your answer. Fig 3.1 …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… ……………………………………………………………………………………………