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ICSE Class X Prelims 2019 : Physics (Delhi Public School (DPS), Newtown, Kolkata) : perlims

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Shivam singh
Delhi Public School (DPS), Newtown, Kolkata

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ICSE Class 10 Physics Question Paper Solution 2019 PHYSICS (PAPER-1) 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 in the ratio 125:9. Find the ratio of their velocities. [2] (c) (i) Name the physical quantity which is measured in calories. [2] (ii) How is calorie related to the S.I unit of that quantity? (d) (i) Define couple. [2] (ii) State the S.I. unit of moment of couple. (e) (i) Define critical angle. [2] (ii) State one important factor which affects the critical angle of a given medium. 10

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