Subject

Physics

Class

ICSE Class 10

Pre Boards

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Sample Papers

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ICSE Class 10 Physics Solved Question Paper 2011

Short Answer Type

31.
i) Define calorimetry.
ii) What is meant by energy degradation?

i) Heat is a form of energy, which flows from the body at a higher temperature to a body at lower temperature. The measurement of the quantity of ehat is called calorimetry.

ii) The dissipation of energy in the form of non useful energy (due to friction) is called energy degradation.

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32.

200 g of hot water at 80^o C is added to 300 g of cold water at 10^o C. Calculate the final temperature of the mixture of water. Consider the heat taken by the container to be negligible.

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33.

Explain why the weather becomes very cold after a hail storm.

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34.

What happens to the heat supplied to a substance when the heat supplied causes no change in the temperature of the substance?

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35.

i) When 1 g of ice at 0^o C melts to form 1 g of water at 0^o C then, is the latent heat absorbed by the ice or given out by it.

ii) Give one example where high specific heat capacity of water is used as a heat reservoir.

iii) Give one example where high specific heat capacity of water is used for cooling purposes.

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36.

250 g of water at 30^o C is present in a copper vessel of mass 50 g. Calculate the mass of ice required to bring down the temperature of the vessel and its contents to 5 degree C.

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37.

A mixture of radioactive substance gives off three types of radiations.

i) Name the radiation which travels with the speed of light.

ii) Name the radiation which has the highest ionizing power.

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38.

i) State two properties which a substance should possess when used as a thermionic emitter.

ii) When an alpha particle gains two electrons it becomes neutral and becomes an atom of an element, which is a rare gas. What is the name of the rare gas?

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