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ISC Class XII Prelims 2019 : Physics (Sri Aurobindo International School, Hyderabad)

7 pages, 56 questions, 27 questions with responses, 31 total responses,    2    0
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SRI AUROBINDO INTERNATIONAL SCHOOL QUARTERLY EXAMINATION SEPTEMBER 2018 CLASS: XII MAX. MARKS: 70 SUB: PHYSICS TIME: 3 HRS (THEORY) (Three hours) (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time.) All questions are compulsory. Question number 1 is of twenty marks, with three subparts, all of which are compulsory. Question numbers 2 to 8 carry 2 marks each with two questions having internal choice. Question numbers 9 to 15 carry 3 marks each with two questions having internal choice. Question numbers 16 to 18 carry 5 marks each. Each question has an internal choice. The intended marks for questions are given in brackets [ ]. All working, including rough work should be done on the same sheet as and adjacent to the rest of the answer.) Answers to sub parts of the same question must be given in one place only. A simple scientific calculator without a programmable memory may be used for calculations. PART I Answer all questions. Question 1 (A) Attempt the following questions by choosing the correct alternative (i), (ii), (iii) or (iv). [5X1=5] i) The electric intensity, at a point on the axis of a short electric dipole, depends on the distance y of the point from the dipole as a) y b) y3 c) y-1 d) y-3 ii) A resistor is stretched 2% in its length. The percentage change in its resistance would be a) 2% positive b) 4% positive c) 2% negative iii) Five resistors are connected as shown in figure . the effective resistnace across AB 1|Page d) 4% negative

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