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ICSE Guess > ICSE Papers > Question Bank > Class X > 2008 >Physics

Answers to this Paper must be written on the paper provided separately.
You will not be allowed to write during the first 15 minutes.
This time is to be spent in reading the Question Paper.
The time given at the head of this Paper is the time allowed for writing the answers.

Section I is compulsory. Attempt any four questions from Section II
The intended marks for questions or the parts of questions given in brackets [ ].

SECTION I (40 Marks)
Attempt all questions from this Section

Question 1

(a) Name the SI unit of:[2]

(i) Linear momentum.

(ii) Rate of change momentum.

Question 1

(b) A body of mass 1.50 kg is dropped from the 2nd floor of a building which is at a height of 12 m. What is the force acting on it during its fall? (g=9.80 m/s2). [2]

(c) When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where does it get its kinetic energy?. [2]

(d) What energy conversions take place in the following when they are working- (i) Electric toaster (ii) Microphone?. [2]

(e) Copy the diagram of the forearm given below, indicate positions of Load, Effort and Fulcrum. [2]

Question 2

(a) (i) A monochromatic beam of light of wavelength λ passes from air into a glass block. Write an expression to show the relation between the speed of light in air and the speed of light in glass.

(ii) As the ray of light passes from air to glass, state how the wavelength of light changes. Does it increase, decrease or remain constant?