Q. Supersonic plane fly with the speed

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Q. Mach number is used in connection with the speed of

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Q. On a stationary sail boat, air is blown from a fan attached to the boat. The boat

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Q. Rainbow is due to

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Q. Stars which appear single to the naked eye but are double when seen through a telescope are

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Q. ML2T-2 is the dimensional formula for

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Q. Solar eclipse will take place when

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Q. Isotopes of an element contain

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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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