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ICSE Class X Prelims 2021 : Physics (Vibgyor High School, Marathahalli, Bangalore)

7 pages, 66 questions, 40 questions with responses, 40 total responses,    0    0
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VIBGYOR HIGH First Preliminary Examination 2020-2021 PHYSICS Grade: X Max. Marks : 80 Date : 24/11/2020 Time Allowed: 2 hour INSTRUCTIONS: 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 the questions or parts of questions are given alongside in brackets [ ]. _________________________________________________________________________ SECTION I (40 Marks) Attempt all questions from this Section. Question 1 a) (i) Name the physical quantity which is measured in calories. [2] (ii) How is calories related to the S.I. unit of that quantity? b) Is it possible to have an accelerated motion with a constant speed? [2] Name such type of motion. c) A quartz prism and not a glass prism is required for obtaining the spectrum of the [2] ultraviolet light. Give reasons d) Define the term velocity ratio.State its S.I. unit. [2] e) A sound wave travelling in water has wavelength 0.4 m. [2] Is this wave audible in air? (The speed of sound in water = 1400 ms -1) 1

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