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# ICSE Class IX Prelims 2019 : 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 (SCIENCE PAPER 1) CLASS- IX 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) (i) SI unit of velocity is: (ms-1 / m min-1). [2] 1 (ii) Correct equation of motion is: ( = + / = + 2 2 ) b) Distinguish between speed and velocity. (2 points) c) State how velocity-time graph can be used to find (i) acceleration of a body (ii) distance travelled by a body in a given time. d) (i) The non-contact force is: (force of reaction / force due to gravity). (ii) The gravitational force between two bodies is: (always attractive / always repulsive). e) Distinguish between mass and weight. (2 points) Question 2 a) (i) State whether Pressure is scalar or vector. (ii) The unit of relative density is b) (i) State Pascal s law of transmission of pressure. (ii) State two factors affecting pressure at a point in a liquid depends. c) Give reasons: (i) A gas bubble released at the bottom of a lake grows in size as it rises to the surface of lake. (ii) It is easier to swim in sea water than in river water. d) Define upthrust. Distinguish between density and relative density. e) Define temperature. At what temperature is density if water maximum? [2] [2] [2] [2] [2] [2] [2] [2] [2] [2] Question 3 a) (i) The source of energy in an ecosystem is: (sun/sugar). [2] (ii) 1J = (1cal / 0.24 cal). b) Distinguish between real and virtual image. (2 points) [2] c) (i) Image formed by a convex mirror is: (erect and diminished / inverted and enlarged) [2] (ii) When a concave mirror is used as a shaving mirror, where is the person s face in relation to focus of mirror? d) Draw a ray diagram to show the formation of image of an object kept in front of a convex mirror. [2] e) (i) Sound is produced by a .. body. [2] 8 -1 -1 (ii) Speed of light in air is .. (3 x 10 ms / 5100 ms ). This paper consists of 3 printed pages.

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