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CBSE Class 12 Pre Board 2021 : Physics - Set 1 (CBSE Gulf Sahodaya Qatar Chapter, Doha)

10 pages, 111 questions, 1 questions with responses, 1 total responses,

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PRE BOARD EXAM, 2020-21 Physics (Code No. 042) Class XII Max. Marks: 70 Max. Time: 3 Hrs. 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. 5. You may use the following values of physical constants wherever necessary. c = 3 x 10 8ms-1 h = 6.6 x 10-34Js e = 1.6 x 10-19 C o = 4 x 10 7T m A 1 1/4 o = 9 x10 9 N m 2 / C 2 me = 9.1 x 10 -31 kg _________________________________________________________________________ Section A All questions are compulsory. In case of internal choices, attempt any one of them. 1. What is the S. I. unit of electric flux? [1] 2. If , , represents wavelength of X-Rays, microwaves & visible rays then arrange wave length in decreasing order. [1] OR Sketch schematic diagram depicting electric and magnetic fields for an electromagnetic wave propagating along x-direction. Page 1 of 10

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