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# ICSE Class 8 Prelims 2020 : Physics (Madhusthali Vidyapeeth, Deoghar)

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 Soumya Roy Sikkim Manipal University (SMU), Gangtok Master of Computer Application Computer Application
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MADHUSTHALI VIDYAPEETH F.M 80 Time 2 Hrs ANNUAL EXAMINATION 2018-2019 SUBJECT: Physics CLASS- VIII 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 Fill in the blanks: a) The unit of pressure is . b) The energy of a body is the capacity to do . c) Water is optically .than air. d) A .mirror always forms a virtual image. e) Boiling occurs at . f) Liquids expand .than solids. g) The time-period of a wave is 2s. Its frequency is . h) A tuning fork produces sound of .frequency. i) A switch is connected to the .wire. j) Charge is shared in charging conductor by method of . Question 2 State true or false and rewrite the corrected statement: a) SI unit of force is kgf. b) The energy of flying kite is kinetic energy. c) Image is formed by a plane mirror due to refraction of light. d) Light travels at lower speed in water than in air. e) Evaporation is rapid on a wet day. f) Boiling is a rapid phenomenon. g) The frequency is measured in seconds. h) In a longitudinal wave, compression and rarefaction are formed. i) A fuse wire is made of silver. j) A lightning conductor saves a building from lightning. [10] [10] Question 3 Choose the correct alternative: [10] a) SI unit of moment of force is (N / N m). b) 1 HP is equal to ( 1 W / 746 W). c) The radius of curvature of a concave mirror is 20cm, its focal length is ( 10cm / 20cm). d) During boiling or vaporization: ( all molecules take part / temperature rises). e) Two rods A and B of same metal, but of length 1m and 2m respectively, are heated from 00C to 1000C. Then: ( both rods A and B elongates the same / rod B elongates more than A). f) Sound can t travel in: (solid / vacuum). g) Electrical work done per unit time is: ( electrical energy / electrical power). h) When switch of an electrical appliance is put off, it disconnects: (earth wire / live and neutral wire). i) The rod in Gold Leaf Electroscope is made of: (brass / ebonite). j) Lightning conductor is made of ( ebonite / copper). This paper consists of 3 printed pages.

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