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MIDTERM EXAMINATION [2023-24] Std : X Total MarkS : 80 PHYSICS (SCIENCE PAPER-1) Time allowed: Two hours Answers to this Paper must be written on the paper provided separately. You will not be allowed to write during first 15 minutes. This time is to be spent in reading the question paper. The time given at the head of this Paper is the time allowed for writing the answers. Section A is compulsory. Attenmpt any four questions from Section B The intended marks for questions or parts of questions are given in brackets [J. SECTION A (Attempt all questions from this Section.) Question i Choose the correct answers to the questions from the given options: (i) For which object position the image formed by a convex lens is of equal size of the object? (a) At F1 (b) At 0 fo) At 2F1 (d) Between F1 and O (ii) Fuse wire is always fitted in a porcelain casing because porcelain is: (a) Insulator (b) Conductor (c) Flexible (d) Rigid (ii) Which of the following is a correct mathematica! relation? (a) power= force/ velocity (b) power = force x acceleration (c) power-force/acceleration (iv) (d) power-force x velocity Which of the following ray produces vitamin D in human body? (a) ultraviolet (b) infrared (e) visible light (d) all of these [15]
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