Science | ICSE Board | Grade 10 | 2014
Q. What are mechanical waves?
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Q. Name a common device that uses electromagnets.
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Q. An electron emitter must have _____ work function and ______ melting point.
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Q. Two forces each of 5N act vertically upwards and downwards respectively on the two ends of a uniform metre rule which is placed at its mid-point as shown in the diagram. Determine the magnitude of the resultant moment of these forces about the midpoint

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Q. When does a force do work?
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Q. Find the equivalent resistance between points A and B.

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Q. A force is applied on:
(i) a non-rigid body
(ii) a rigid body.
How does the effect of the force differ in the above two cases?
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Q. The conversion of part of the energy into an undesirable form is called ______
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Q. State one important advantage and disadvantage each of using nuclear energy for producing electricity.
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Q. A body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
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Q. Which colour of light travels fastest in any medium except air?
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Q. Draw the diagram given below and clearly show the path taken by the emergent ray

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Q. Is it possible to have an accelerated motion with a constant speed? Explain
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Q. State the energy changes in the following devices while in use:
(i) A loud speaker
(ii) A glowing electric bulb
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Q. Calculate the change in the kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
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Q. What is nuclear energy?
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Q. A ray of light passes from water to air. How does the speed of light change?
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Q. Name the radiations which can be detected by a thermopile.
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Q. Name the factors affecting the critical angle for the pair of media.
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Q. Name one property of waves that do not change when the wave passes from one medium to another
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Q. Draw a diagram to show how a single pulley can be used so as to have its ideal Mechanical Advantage (M.A.)=2
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Q. What is the principle of an ideal machine?
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Q. Name a prism required for obtaining a spectrum of ultraviolet light.
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Q. For a given height h, ____ the length of the inclined plane, lesser will be the effort required.
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Q. What is the work done by the moon when it revolves around the earth?
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Q. What is consumed by different electrical appliances, for which electricity bills are paid?
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Q. A man having a box on his head, climbs up a slope and another man having an identical box walks the same distance on a levelled road. Who does more work against the force of gravity and why?
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Q. A metallic ball is hanging by a string from a fixed support. Draw a neat labelled diagram showing the force acting on the ball and the string
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Q. 50 g of metal piece at 27C requires 2400 J of heat energy so as to attain a temperature of 327C. Calculate the specific heat capacity of the metal.
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Q. What is the weight of a body placed at the centre of the earth?
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