A body of mass 5 kg is moving with a velocity of 10 m/s. What wi

Subject

Physics

Class

ICSE Class 10

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Sample Papers

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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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