Q. Siphon will fail to work if

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Q. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to

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Q. Nuclear sizes are expressed in a unit named

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Q. Light year is a unit of

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Q. Mirage is due to

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Q. Light from the Sun reaches us in nearly

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Q. Stars appears to move from east to west because

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Q. Pa(Pascal) is the unit for

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Q. Planets do not twinkle because

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Q. Metals are good conductors of electricity because

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Q. Let a thin capillary tube be replaced with another tube of insufficient length then, we find water

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Q. Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?

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Q. If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same

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Q. Pick out the scalar quantity

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Q. Rectifiers are used to convert

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Q. out of the following, which is not emitted by radioactive substance?

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Q. Sound waves in air are

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Q. Magnetism at the centre of a bar magnet is

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Q. It is more difficult to walk on a sandy road than on a concrete road because

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Q. Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

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