ICSE Physics Sample Paper


GuessPaper – 2008-09

Class– X

Subject- Physics


Paper 1 (Physics)

(An hour and a half)


Answers to thispaper must be written on the paper provided separately

You will notbe allowed towrite during the first 15minutes

This time is tobe spent in reading the question paper

The time given atthe head of this paper is the time allowed for writing the answers.



Section Iis compulsory.Attempt anyfour questionsfrom section II

The intendedmarks for questions are given in brackets []




SECTION –1 (40 marks)

Attempt allquestions from thissection

Question–1 [ 2 x 5 = 10]

   1.     

      What    is a lever? Which class of lever has mechanical advantage always    more than 1?
          
   2.

      What    are the applications of a machine? Give any two of them.
          
   3.

      Derive    relation between kinetic energy and momentum.
          
   4.

          What state(smaller or    bigger) does an object appear when viewed from a denser medium into    a rarer medium? Draw a diagram in support of your answer.
          
   5.

          Give any two advantages of    the ring system over tree system.

Question–2 [ 2 x 5 = 10]

   1.     

          Define S. I. Unit of power.    How is it related with the C.G.S. unit?
          
   2.

          Give the conditions    essential for the occurrence of total internal reflection.
          
   3.

          Define Ohm’s law.    What is its limitation?
          
   4.

          Explain why water is used    in fomentation.
          
   5.

          Which type of lens always    produces a virtual image? What is the other name of this lens?

Question– 3 [ 2 x 5 = 10]

   1.     

          Draw a diagram to shoe the    color triangle.
          
   2.

          What is resonance? Give any    two disadvantages of resonance.
          
   3.

      Explain    why does a coolie do no work even after lifting up a load on his    head and covering distances.
          
   4.

          Give a device, which    converts sound energy to electrical energy. Give a place where it    finds its use.
          
   5.

          The temperature of 1.5 kg    of copper is to be raised from 20oC    to 80oC.    Calculate the heat required for this process if the specific heat    capacity of copper is 400 J Kg-1    K-1.

Question– 4 [ 2 x 5 = 10]

   1.     

          What are complementary    colors? Give an example.
          
   2.

      What    is the principle of calorimetry?
          
   3.

      Show    that the minimum distance between a man and a reflecting surface    should be at least 17 meters for him to hear the echo clearly. ( You    can assume the speed of sound to be 340ms-1)
          
   4.

          Draw a graph of force    against mass for a constant accelration.     
          
   5.

          Give the substance, which    is used as a fuse wire. Give any 1 reason as to why any ordinary    wire may not serve the purpose of a fuse wire.



SECTION – II (40 Marks )

Answer any fourquestions from this section



Question-5 [2 +2+2+2 +2 =10]

   1.     

          The ratio of amplitudes of    two waves is 4:9. What is the ratio of their intensities?
          
   2.

          Give two differences    between a nuclear reactor and a nuclear bomb.


   3.     

          A crowbar of length 120 cm    has its fulcrum situated at a distance of 20 cm from the load.    Calculate the M.A. of the lever. Also state the class to which it    belongs.
          
   4.

          Can the E.M.F. of a cell    exceed its terminal voltage? Why?
          
   5.

          A geyser is rated 1500 W    and 250 V. If this geyser is connected to 250 V mains, calculate the    energy consumed in 50 hours. What will happen if it is connected to    280 V mains?

Question-6[ 2+3 +2 +1+ 2 =10]

   1.     

          State the factors on which    the torque acting on a rectangular coil in a magnetic field depends.    In what position of the coil will the torque acting on it be    maximum?
          
   2.

          How can galvanometer be    converted to a voltmeter? Why are voltmeters connected in parallel?    Why should a voltmeter have a very high resistance?     
          
   3.

          Give two points of    difference between a D.C. motor and a Dynamo.     
          
   4.

          If amplitude of a wave is    halved what will be effect on it’s frequency?     
          
   5.

          A metal M emits electrons    when heated to 700oC.    Another metal N emits electrons only when heated to 1250oC.    Why?

Question- 7 [ 4+2+3+1=10]

   1.     

      Draw    a labeled diagram of a hot cathode ray tube. Give the functions of    any two parts.
          
   2.

      For    which color of the spectrum, glass has:
          
         1.         

            Maximum        refractive index
                    
         2.

            Refractive        index of 1.5.
                
          
   3.

      A    6cm high object is placed 12 cm from a concave lens of focal length    8 cm. Find by a scale diagram the position, size and nature of    image.     
          
   4.

      Give    a relation between efficiency, mechanical advantage and velocity    ratio.