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ICSE Class 10

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ICSE Class 10 Physics Solved Question Paper 2014

1.

Name one property of waves that do not change when the waves pass from one medium to another?

Frequency

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2.

The conversion of part of the energy into an undesirable form is called …………… .

Dissipation of energy.

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3.

A metallic ball is hanging by a string from a fixed support. Draw a neat labelled diagram showing the forces acting on the ball and the string.

where,

T is the tension in the string, and

mg - weight of the ball
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4.

An electron emitter must have ____ work function and ____ melting point.

low

,

high

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5.

Is it possible to have an accelerated motion with a constant speed? Explain.

Yes. The velocity of particle in circular motion is variable or the circular motion is accelerated even though the speed of particle is uniform.

The velocity vector is constant in magnitude but changing in direction. Since the direction changes, acceleration is not unifrom.

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6.

i) When does a force do work?

ii) What is the work done by the moon when it revolves around the Earth?

i) Work is said to be done only when the force applied on a body makes the body move, that is, there is displacement of the body.

ii) The work done by the moon when it revolves around the earth is zero. This is because the work done for a closed path is zero.

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7.

Calculate the change in kinetic energy of a moving body if it’s velocity is reduced to 1/3rd of the initial velocity.

Given:

Initial velocity = v

Final velocity = v/3

Initial kinetic Energy,
Final Kinetic Energy, K2 =
Change in Kinetic energy

=

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8.

For a given height, ………… the length l of the inclined plane, lesser will be the effort required.

More

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9.

What is the weight of the body placed at the center of the earth?

The weight of a body placed at the centre of the earth is zero.

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10.

A force is applied in i) a non- rigid body and ii) a rigid body. How does the effect of the force differ in the above two cases?

A force when applied on a rigid object does not change the inter-spacing between its constituent particles and therefore it does not change the dimensions of the object, but causes motion in it.

On the other hand, a force when applied on a non-rigid object, change the inter-spacing between its constituent’s particles and therefore cause a change in its dimensions.

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