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# ICSE Class X Prelims 2020 : Physics (Children's Academy, Bachani Nagar, Malad East, Mumbai)

7 pages, 80 questions, 0 questions with responses, 0 total responses,    2    0
 Chandrashekhar Baviskar Smt. Sulochanadevi Singhania School, Thane X
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PRELIMINARY EXAMINATION 2019-20 Grade: X Subject: PHYSICS Date: 04/12/2019 Marks: 80 Time: 2 hours You will not be allowed to write during the 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. This paper consists of 7 printed pages Attempt all questions from Section I and any four questions from Section II The intended marks for questions or parts of questions are given in brackets [ ] Section I (40 Marks) Attempt all questions from this section Question 1 (a) Define moment of couple. Write its S.I unit. [2] (b) State any two difference between work and power. [2] (c) A pair of scissors is used to cut a piece of a cloth by keeping it at a [2] distance 8.0 cm from its rivet and applying an effort of 10 kgf by fingers at a distance 2.0 cm from the rivet. Find: (i) the mechanical advantage of scissors (ii) the load offered by the cloth. (d) In which conditions will the light ray moving from liquid to glass passes straight without bending? Will the glass be visible then? [2] (e) Complete following sentence: If half part of a convex lens is covered the focal length ___________ and intensity of the image________. [2] Question 2 (a) (i) What will be the change in specific resistance of the wire if it is stretched to double of its original length? (ii) Name the S.I unit of specific resistance. [2] (b) Arrange the following as per the sequence they are connected in live wire: ELCB, kWh meter, MCB, 50 A fuse. [2] (c) (i) Which type of electromagnet is commonly used in relay? (ii) Why d.c source is preferable to magnetise the electromagnets? Physics/Grade X/ICSE/Preliminary Examination/ Page 1 of 7 [2] CAT/LD/2019-20

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