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CBSE Class 12 Pre Board 2021 : Physics - Set 3 (CBSE Gulf Sahodaya Qatar Chapter, Doha)

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MODEL EXAMINATION (2020- 21) PHYSICS (THEORY-042) CLASS XII Marks: 70 Time:3hours 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. c = 3 x 108 m/s h = 6.63 x 10-34 Js e = 1.6 x 10-19 C ! = 4 x 10-7 TmA-1 ! = 8.854 x 10-12 C2N -1m-2 ! "#$! = 9 x 109 N m2 C-2 me = 9.1 x 10-31 kg mass of neutron = 1.675 x 10-27 kg mass of proton = 1.673 x 10-27 kg Avogadro s number = 6.023 x 1023 per gram mole Boltzmann constant = 1.38 x 10-23 JK-1 Page 1 of 8

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