Q. One watt-hour is equivalent to

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Q. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?

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Q. In which of the following industries is mica as a raw material?

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Q. Radiocarbon dating technique is used to estimate the age of

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Q. Identify the vector quantity from the following

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Q. Large astronomical telescopes always use as objective

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Q. One should not connect a number of electrical appliances to the same power socket because

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Q. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this?
I. Diffusion
II. Refraction
III. Internal reflection

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Q. Natural radioactivity was discovered by

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Q. Planets are

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Q. One nanometer is equal to

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Q. Mica is used in electrical appliances such as electric iron because mica is

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Q. It is easier to roll a barrel full of coal tar than to pull it because

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Q. Minimum number of unequal vectors which can give zero resultant are

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Q. Intensity of sound has

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Q. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from

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Q. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is

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Q. Atomic bomb was first successfully developed by

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Q. Atomic bomb was successfully developed in

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Q. Atomic theory was developed by John Dalton in

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