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DPSINTERNATIONA SCHOOL 36 Aroozoo Avenne (opp Srin Park) Singapore 539842 Tel: (65) 62856.300 Fax: (65) 6285S1670 Website: www.dps.edu.sg FIRST PRELIMINARY EXAMINATION 2023 - 2024 MARKS: 80 GRADE:10 ICSE SUBJECT: PIIYSICS DATE::11:2023 TIME: 2 hrs. INSTRUCTIONS 1. Youare rquired to utilize the first 15 minutes for reading the Question paper. 2. You will notbe allowed to writeduring this time. 3. Neaness should be maintained by avoiding overwriting or striking oul. 4. Do not use whiteners or correction tapes. 3. Do not copy the question 6. You are advised toanswver only that number of questions as mentioned in the question paper. Section A is compulsory. Altempt any four questions from Section B. The itended marks for questions or parts of questions are given in brackets/ / SECTIONA(40 MARKS) (Attempt all the questions) Question 1. Choose correct answer tothe questions from the given options. (15] i) The K.E of agiven body depends on the a. Position b. Centre of gravity of the body c. Momentum d. Displacement (i ) A given nucleus of an atom consists of 146 neutrons and 95 protons. It decays after emitting an alpha particle. How many protons and neutrons are left in the nucleus after an alpha emission? a. Protons = 93, neutrons = 144 b. Protons =95, neutrons 142 C. Protons 89, neutrons 144 d. Protons 89, neutrons 142 image in terms i ) For aconvex lens, the minimum distance between an objcct and its real of focal length () of a piven lens must be.
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