Trending ▼   ResFinder

ICSE Class X Prelims 2021 : Physics (Lokhandwala Foundation School (LFS), Kandivali East, Mumbai)

4 pages, 56 questions, 15 questions with responses, 15 total responses,    0    0
 Kiah Jaiswal Lokhandwala Foundation School (LFS), Kandivali East, Mumbai
+Fave Message
 Home > kj_18 >   F Also featured on: School Page

Formatting page ...

Cal LOKHANDWALA FOUNDATION SCHOOL PRELIMINARY EXAMINATION - 2020-21 SUBJECT: PHYSICS Date : 15/01/2021 Duration: 2 hrs Grade: 10 Max Marks: 80 __________________________________________________________________________________ General Instructions: This question paper consists of two sections A and B. Section A is compulsory. Attempt any four questions from Section B. This paper consists of 4 printed sides. __________________________________________________________________________________ SECTION A (40 marks) (Attempt all questions from this section) Question 1 a) In a uniform circular motion, the body moves with uniform acceleration. Is this statement true? Explain your answer. (2) b) How much work is needed to be done on a ball of mass 100 g to give it a momentum of 5 kg m/s ? (2) c) A radioactive substance is oxidized. How would the nature of radioactivity be changed ? Explain your answer. (2) d) Name the constituent colour of white light for which i) the deviation produced by the glass prism is the least . ii) the refractive index of glass is maximum. (2) e) State two differences between Forced and Resonant vibrations. (2) Question 2 a) Calculate the power of an engine required to lift 100 kg of coal per hour from a mine 360 m deep ? (Take g= 10 m/s ). (2) b) Name a simple machine which can be used to : i) multiply force ii) only change the direction of force applied. (2) c) 2000 calories of heat is supplied to 100 g of water. Find the rise in temperature. (Take specific heat capacity of water as 1 cal g C .) (2) d) Which is easier to turn: A steering wheel of a large diameter or a steering wheel of a small diameter ? Explain your answer. (2) e) A ray of light enters a glass slab as shown in the figure below. Copy and complete the path of the ray till it emerges out from the slab. Mark the necessary angles in the diagram . (2) Question 3 a) State the conditions required for the total internal reflection of light to take place. (2) P.T.O

Formatting page ...

Top Contributors
to this ResPaper

 Shriya Karlapudi(15)

Formatting page ...

Formatting page ...