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ICSE 2 Prelims 2017 : Physics (Smt. Sulochanadevi Singhania School, Thane)

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Gaurav Sharma
Smt. Sulochanadevi Singhania School, Thane
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SMT. SULOCHANADEVI SINGHANIA SCHOOL, THANE SECOND PRELIM PHYSICS QUESTION PAPER TIME ALLOWED 2 HOURS MAXIMUM MARKS 80 SECTION I (40 MARKS) ATTEMPT ALL QUESTIONS FROM THIS SECTION Question 1[2x5=10] a) State the work- energy theorem. b) Give two points of difference between uniform circular motion and uniform linear motion. c) Draw a schematic diagram of a lever whose mechanical advantage is always less than one. d) Define the term: second focal point of a lens. e) Why is it more economical to transmit electrical energy at high voltage and low current? Question 2[2x5=10] a) Define total internal reflection. b) Give two points of difference between a step- up transformer and a step- down transformer. c) What is meant by green house effect? d) Draw a neat circuit diagram showing the use of dual control switches to light a staircase electric lamp. e) A bus and a car are moving on a horizontal road with the same kinetic energy. They are brought to rest by the application of brakes which provide equal retarding forces. Which of these will come to rest in a shorter distance? Justify. Question 3[2x5=10] a) How will the lateral displacement of a light ray be affected if: i. The thickness of the rectangular block is reduced. ii. Angle of incidence is increased. b) A nucleus contains no electrons, but it can emit them .How? 1

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