ICSE/ isc Guess Paper

Physics-2009

Class X

Q1. (a) A tennis ball and a table tennis ball have the same momentum, which of the two has more kinetic   energy and why?

         (b) Comment on the statement “The mechanical advantage of a machine is greater than one”?

         (c)  Air bubbles emerging out of a fish tank appear silvery. Why?

         (d)  Define Angle of deviation?

         (e) During ? emission, how do the following change:

               (i) Mass number of radioactive element?

               (ii) Atomic of radioactive element?

Q2.

a)      What is total internal refraction of light? What are the conditions required for total refraction to take place?

b)      Draw a ray diagram for 180⁰ deviation of path of light through a prism?

c)      Name the invisible spectra. How can their presence be detected?

Q3.

(a) Mention any two differences between the mass and weight of a body.

(b) State the amount of work done by an object when it moves in a circular path for one complete rotation. Give a reason to justify your answer.

(c) An object is placed in front of a convex lens such that the image formed has the same size as that of the object. Draw a ray diagram to illustrate this.

(d) Give two reasons as to why copper is preferred over other metals for making calorimeters.

(e) Calculate the height through which a body of mass 0.5 kg should be lifted if the energy spent for doing so is 1.0 joule. (g = l0 ms^-2).

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