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July 7th, 2014, 08:31 AM
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ICSE Board Previous year paper
I need the ICSE Board Previous year paper of physics, will you please provide me the same???? As you need the ICSE Board Previous year paper of physics, here I am sharing the same: (a) (i) Draw a displacement-distance graph for two waves A and B such that the amplitude of wave A is three times that of wave B. (ii) Give one example of forced vibration. (iii) State two necessary conditions for hearing a distinct echo. [3] (b) John fires a gun towards a hill and hears its echo after 5 seconds. He then moves 320 m towards the hill and fires his gun again. This time he hears the echo after 3 seconds. Calculate the velocity of sound. a) (i) Define work function of a metal. (ii) State two factors on which the rate of emission of thermions depend. [3] (b) (i) Define Radioactivity. (ii) A radioactive substance is oxidized. What change would you expect to take place in the nature of its radioactivity? Give a suitable reason. [3] (c) ‘Radioactive materials as an alternative source of energy must be used wisely’. Give reasons to justify this statement. Last edited by Neelurk; April 14th, 2020 at 09:18 AM. |
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