ICSE Class 10 Physics Question Paper 2007. Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.
Physics
SECTION I (40 Marks)
Attempt all questions from this Section
Question 1
(a) Which class of levers has a mechanical advantage always greater than one? What change can be brought about in this lever to increase its mechanical advantage? [2]
(b) Two bodies A and B of equal mass are kept at heights 20 m and 30 m respectively. Calculate the ratio of their potential energies. [2]
(c) What is the S.I. unit of upthrust? Mention one factor on which the upthrust of a liquid depends. [2]
(d) Why are infra-red radiations preferred over ordinary visible light for taking photographs in fog? [2]
(e) Define Relative density of a substance. [2]
Question 2
(a) Mention two reasons why water is not suitable barometric liquid. [2]
(b) State Snell's Law of Refraction of Light. [2]
(c) (i) What will be the color of a blue flower when it is seen in magenta colored light.
(ii) Name another secondary color of light in which the flower will show the same color as it shows in the magenta colored light. [2]
(d) The upper blood pressure of a patient is 160 cm of mercury whereas the normal blood pressure should be 120 cm of mercury. How much extra pressure is generated by the heart above the normal pressure? (Give your answer in S.I. unit.) (Density of mercury = 13600 kg m-3 ; g = 9.8 ms-2) [2]
(e) Draw an approximate graph to show the variation of atmospheric pressure with altitude. [2]
Question 3
(a) What will an alpha particle change into when it absorbs:- [2]
i. One electron;
ii. Two electrons?
(b) Some hot water was added to three times its mass of cold water at 100C and the resulting temperature was found to be 200C. What was the temperature of the hot water? [2]
(c) Calculate the value of the resistance which must be connected to a 15Ω resistance to provide an effective resistance of 6Ω. [2]
(d) Why are burns caused by steam more severe than those caused by boiling water at the same temperature? [2]
(e) Mention two important properties of a metal that make it a good thermionic emitter. [2]
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