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ISC Class XII Prelims 2020 : Physics (Don Bosco Senior Secondary School, Vaduthala, Kochi, Ernakulam)

5 pages, 47 questions, 1 questions with responses, 1 total responses,    0    0
Tiara Elizabeth
Indian Certificate of Secondary Education (ICSE), New Delhi
10th
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Sample Paper Class XII Subject PHYSICS Marks:70 Time: 3 Hours (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time) om Answer all questions in Part I and six questions from Part II, choosing two questions from each of the Sections A, B and C. All working, including rough work, should be done on the same sheet as, and adjacent to, .c the rest of the answer. pe rz The intended marks for questions or parts of questions are given in brackets [ ]. (Material to be supplied: Log tables including Trigonometric functions) A list of useful physical constants is given at the end of this paper. Pa Part I (Compulsory) Question 1 A. Choose the correct alternative (a),(b), (c) or (d) for each of the questions given below: A dipole placed in a uniform electric field experiences st (i) Te (a) only a net force (c) both a net force and a torque (ii) [5] (b) only a torque (d) neither a fore nor a torque The force on a charged particle moving in a magnetic field is maximum when the angle between direction of motion and field is (a) zero (iii) (d) 180o (b) A bi prism (c) a grating (d) an octagonal mirror In a sample of radioactive material what percentage of material will decay in one half life ? (a) 50% (v) (c) 90o An important component of Michelson s method to determine speed of light is: (a) A Nicol prosm (iv) (b) 45o (b) 37% (c) 69.3% (d) 63% The kinetic energy of a photon depend upon .of radiation (a) intensity (b) frequency (c) velocity (d) direction

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