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ICSE Class IX Board Exam 2020 : Physics

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The First Steps Pre-Annual Examination- 2020 Class IX Physics Time: 2 hrs Total Marks: 80 General Instructions: 1. Answers to this paper must be written on the paper provided separately. 2. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the question paper. 3. The time given at the head of the paper is the time allotted for writing the answers. 4. Attempt all questions from Section I and any four questions from Section II. 5. The intended marks of questions or parts of questions are given in brackets [ ]. SECTION I (40 Marks) Attempt all Questions from this Section Question 1 (a) Define light year and astronomical unit. [2] (b) Draw symbols and state functions of the following components in an electric circuit: i. Ammeter ii. Voltmeter iii. Rheostat [2] (c) A block of mass 7 kg and volume 0.07 m 3 floats in a liquid of density 140 kg m -3. Calculate the volume of the block above the surface of the liquid. [2] (d) A person moves 10 m towards the east and then 10 m towards the north. What is the displacement? [2] (e) What is sound? How is it produced? [2] Question 2 (a) Define the term amplitude of a wave. Write its SI unit. [2] (b) The rate of change of momentum of a body is 3 kg ms-2. What is the force acting on the body? [2] (c) Differentiate between the two types of cell. [2] (d) You are given a body of mass 12 kg. Calculate the: i. force exerted by the Earth on the body and ii. force exerted by the body on the Earth. Take g = 10 N/kg. [2]

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