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Class 12 ISC Prelims 2017 : Physics (Smt. Lilavatibai Podar High School (LPHS), Mumbai)

6 pages, 52 questions, 45 questions with responses, 62 total responses,    0    0
Harshitha
St. Ann's High School ICSE / ISC, Secunderabad
7th to 12th science stream
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Subject: PHYSICS (Paper I) (Theory) Std : XII Date : Time : 3 hours Marks : 70 (Candidates are allowed additional 15 minutes for only reading the papers They must NOT start writing during this time) --------------------------------------------------------------------------------------------------------------------------------------Answer all questions in Part I and Ten questions from Part II, Choosing Four questions from section A, Three questions from section B and Three from section C. All working including rough work should be done on the same sheet as, and adjacent to the rest of the answer. The intended marks for questions or parts are given in brackets [ ]. A list of useful physical constants is given at the end of this paper. ----------------------------------------------------------------------------------------------------------------------------- ---------- PART I (All questions are compulsory) Question 1 A. Answer all questions by choosing the correct option A, B, C or D. i. Three charges 4q, Q and q are in a straight line in the positions 0, l/2 and l respectively. Resultant force at q will be zero if Q is equal to: (A) q (B) -2q (C) q/2 (D) 4q ii. Sensitivity of a moving coil galvanometer can be increased by (A) increasing number of turns (B) increasing magnetic field intensity (C) increasing area of coil (D) all of these [5] This Question paper consists of 6 printed sides. iii. When a charged particle is projected perpendicular to an uniform magnetic field, it describes a circular path in which: (A) its speed remains constant (B) its velocity remains constant

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