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ICSE Prelims 2015 : (Bishop Cotton Boys School (BCBS), Bangalore)

5 pages, 66 questions, 48 questions with responses, 54 total responses,    0    0
Karthik Suresh
Bishop Cotton Boys' School (BCBS), Bangalore
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BISHOP COTTON BOYS SCHOOL: BANGALORE TRIAL EXAMINATION : JANUARY 2015 PHYSICS STD. X DATE: 10.01.2015 MARKS: 80 TIME : 2 Hrs. Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time. The time given at the head of this paper is the time allowed for writing the answers. The intended marks for questions are given in brackets [ ]. This paper contains 5 printed pages. SECTION A [4 x10 = 40] Answer all questions Question I. a. State the energy changes that take place in the following when they are in use: i. a photovoltaic cell. ii. an electromagnet. [2] b. i. Name the class of levers has a mechanical advantage always greater than one? ii. What change can be brought about in this lever to increase its mechanical advantage? [2] c. Name the physical quantity that is measured in i. electron volt ii. kilowatt hour. [2] d. State two uses of a gear system. [2] e. i. How is force related to the momentum of a body? ii. State the condition when the change in momentum of a body depends only on the change in its velocity. [2] Question 2 a. i. A half metre ruler is suspended by a thread from the midpoint of the ruler as shown in figure 2. Fig - 1 Std.12/ 2014 2015 /Trial Exam /Physics /1

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