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ICSE Prelims 2016 : Science (St. Francis School, Visakhapatnam)

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Ethakoti Honey
St. Francis School (SFS), Madhurawada, Visakhapatnam
1st to 10th science and maths
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EVERGREEN MODEL TEST PAPERS ICSE 100% SUCCESS IN PHYSICS-10 EVERGREEN SERIES SOLUTION FOR EVERGREEN MODEL TEST PAPERS EVERGREEN MODEL TEST PAPER - 1 SECTION - I (40 MARKS) Answer 1. (a) No, the couple acting on a rigid body can cause only rotatory motion. It cannot produce translatory motion. (b) 1J = 1N 1m = 1 kgms 2 1m = 1 kgm2s 2 = 1000 g (100 cm)2s 2 = 107g cm2s 2 1J = 107 ergs (c) No, because a part of input is wasted : (i) in moving the parts of the machine. (ii) in overcoming friction between various parts of machine. (d) According to the question, L + W = 2T and E = T L = 2T W Mechanical Advantage = E L 2T W = E T W T W =2 E =2 (e) We know that, kinetic energy K = Load L p2 2m K1 2m p2 = 1 22 K2 2m1 p2 p1 = p2 , m1 = 5 g, m2 = 35 g m2 35 7 K1 = m = = K2 5 1 1 Here, Here, ratio is Answer 2. K1 : K2 = 7 : 1 (a) The first beaker will have water at a higher temperature because of hidden heat (latent heat) which is released by steam at 100 C when it condenses to form water at 100 C. (b) The image is enlarged and erect, therefore, the lens is convex and the measurement of O F will give the focal length of the lens. The course of rays is as given below. A L A F I O O (1) e-mail : epildelhi@gmail.com

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