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ICSE Class X Board Exam 2019 : Physics

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PHYSICS SCIENCE Paper 1 (Two hours) Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the Question Paper. The time given at the head of this Paper is the time allowed for writing the answers. Section I is compulsory. Attempt any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. SECTION I (40 Marks) Attempt all questions from this Section Question 1 (a) The diagram below shows a claw hammer used to remove a nail: [2] Claw hammer Nail (i) To which class of lever does it belong? (ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one. (b) Two bodies A and B have masses in the ratio 5:1 and their kinetic energies are [2] in the ratio 125:9. Find the ratio of their velocities. (c) (i) Name the physical quantity which is measured in calories. (ii) How is calorie related to the S.I unit of that quantity? This Paper consists of 9 printed pages and 1 blank page. T19 521 Turn over Copyright reserved. [2]

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