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CBSE Class 11 Pre Board 2021 : Physics - Annual Final (CBSE Gulf Sahodaya Qatar Chapter, Doha)

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Annual Examination, 2020-2021 PHYSICS Grade: 11 Date: 07.02.2021 Time: 3 Hours Max. Marks: 70 General Instructions. (1) All questions are compulsory. There are 33 questions in all. (2) This question paper has five sections: Section A, Section B, Section C, Section D and Section E. (3) Section A contains ten very short answer questions and four assertion reasoning MCQs of 1 mark each, Section B has two case based questions of 4 marks each, Section C contains nine short answer questions of 2 marks each, Section D contains five short answer questions of 3 marks each and Section E contains three long answer questions of 5 marks each. (4) There is no overall choice. However internal choice is provided. You have to attempt only one of the choices in such questions. You may use the following values of physical constants wherever necessary: c = 3 x 108 ms-1 h = 6.626x10-34 J s e = 1.602x10-19 C KB = 1.38x10-23 JK-1 NA = 6.023x1023 mole-1 O = 4 x 10-7 T m A-1 me = 9.1 x 10-31 kg mn = 1.675 x 10-27 kg Radius of earth = 6400 km 1 4 = 9x109 N m2 C-2 Section A All questions are compulsory. In case of internal choices, attempt any one of them. 1. Can a moving body have relative velocity zero with respect to another body? Give 1 an example . 2. At which point of the trajectory is the speed of motion minimum? 1 (OR) At what angle of projection the horizontal range will be maximum? 3. Name the physical quantity whose SI unit is kg m s -1. 1 4. What is angle between frictional force and instantaneous velocity of the body moving over a rough surface? 1 (OR) What is the angle of friction between two surfaces in contact, if coefficient of friction is 3? 1 of 9

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