Catholic High 2023_Year 4 Physics_TA3_with ANSWERS (FINAL)

Name: ANSWERS Index Number: Class: CATHOLIC HIGH SCHOOL Term 3 Class Test Year 4 (Integrated Programme) PHYSICS Moments, Energy, Work and Power, Current of Electricity, DC Circuits, Magnetism, Electromagnetism, Electromagnetic Induction 31 July 2023 40 minutes READ THESE INSTRUCTIONS FIRST Write your name, index number and class on all the work that you hand in. Write in dark blue or black pen. Do not use paper clips, glue or correction fluid. The use of an approved scientific calculator is expected, where appropriate. At the end of the examination, fasten all your work securely together. Section A: Multiple Choice There are ten questions in this section. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in the table provided at the end of this section. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. Section B: Structured You may use an HB pencil for any diagrams or graphs. Answer all questions. Candidates are reminded that all quantitative answers should include appropriate units. Candidates are advised to show all their workings in a clear and orderly manner, as more marks are awarded for sound use of Physics than for correct answers. The number of marks is given in brackets [ ] at the end of each question or part question. For examiner’s use only: Section A / 10 Section B / 25 formula s.f.   Total / 35 This document consists of 12 printed pages.

2 Section A Answer all the questions in this section. Record your choice in the table below. Answers for Section A 1 2 3 4 5 6 7 8 9 10 1 The diagram shows a decoration, which is made by suspending objects P, Q and R from light rods M and N. The masses of P, Q and R are such that the rods are horizontal. Which row gives a possible combination of the masses of P, Q and R? mass of P / g mass of Q / g mass of R / g A 10 10 10 B 15 10 10 C 15 20 10 D 20 40 20

3 2 A girl uses paper clips to balance a toy bird on her finger as shown. What is the effect of the paper clips? A They do not affect the centre of gravity but increase the weight. B They help to change the centre of gravity to be above her finger. C They help to change the centre of gravity to be at her finger. D They help to change the centre of gravity to be below her finger. 3 An athlete keeps fit by doing push-ups. He applies a force of 300 N as he pushes up a distance of 0.5 m. He does 10 push-ups in 30 seconds. What is the total work done by him in 30 seconds? A 50 J B 150 J C 1 500 J D 15 000 J

4 4 The graph shows the variation with voltage of the current in a 12 V lamp. From the graph, which statement about the resistance of the lamp is correct as the voltage