Subject

Physics

Class

ICSE Class 10

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsShort Answer Type

1.

What is the SI unit of energy? How is the electron volt (eV) related to it? 

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2.

State the energy changes that takes place in the following when they are in use:

i) a photovoltaic cell

ii) an electromagnet

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3.

A body of mass 5 kg is moving with a velocity of 10 m/s. What will be the ratio of its initial kinetic energy and final kinetic energy, if the mass of the body is doubled and its velocity is halved? 


K. E subscript 1 space equals space 1 half space m v squared space
italic space italic space italic space italic space italic space italic space italic space italic space equals space 1 half space cross times space 5 space cross times space left parenthesis 10 right parenthesis squared space

italic space italic space italic space italic space italic space italic space italic space italic space italic space equals 1 half cross times 500 space equals space 250 space J

K. E subscript italic 2 space equals space italic 1 over italic 2 space m v to the power of italic 2 space
italic space italic space italic space italic space italic space italic space italic space italic space equals space italic 1 over italic 2 space cross times space 10 space cross times space left parenthesis 5 italic right parenthesis to the power of italic 2 space

italic space italic space italic space italic space italic space italic space italic space italic space equals space 5 space straight x space 25 space equals space 125 space straight J

fraction numerator K. E subscript 1 over denominator K. E subscript 2 end fraction space equals space 250 over 125 space equals 2 over 1   
Initial kinetic energy will become twice of the final kinetic energy. 
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4.

6.5 kJ of energy causes a displacement of 64 m in a body in the direction of force in 2.5 seconds. Calculate:

i) the force applied

ii) power in horse power(hp)

[ Take 1 hp = 764 W]

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5.

With reference to the terms mechanical advantage, velocity ratio and efficiency of a machine, name the term that will not change for a machine of a given design.

ii) Define the term stated by you in part (i). 

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6.

A ray of light strikes the surface of a rectangular glass block such that the angle of incidence is i) 0o ii) 420. Sketch a diagram to show the approximate the path taken by the ray in each case as it passes through the glass block and emerges from it. 

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7.

State the conditions required for total internal reflection of light to take place.

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8.

Copy and complete the following table:

Types of lens

Position of object

Nature of image

Size of image

Convex

At F

 

 

concave

At infinity

 

 

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9.

i) Copy and complete the diagram to show the formation of the image of the object AB.

ii) What is the name given to X. 

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10.

i) Why is white light considered to be polychromatic in nature?

ii) Give the range of the wavelength of those electromagnetic waves which are visible to us.
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