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The atmosphere is heated mainly by:
A device used for converting AC into DC is called:
Energy of Ultraviolet rays is greater than:
To an astronaut, the sky appears:
The instrument used to measure the speed of the wind is:
Who defined the law of gravitation?
The metal used to make lightning conductors is:
‘IC’ in computers stands for:
A hydrogen balloon floats up because of
In a rechargeable cell what kind of energy is stored within the cell?
Which one of the following lenses should be used to correct the defect of astigmatism?
Superconductors are those elements:
Suppose if we measure the time lapse between the two Sunsets by sitting on the beach, from this we can estimate:
In a Laser (say neon laser) all the atoms emit the light waves of:
Which of the following has got more heat capacity:
Of the following Indian satellites, which one is intended for long distance telecommunication transmitting TV programmes?
What is the full form of ‘AM’ regarding radio broadcasting?
Which colour is the complementary colour of yellow?
During washing of clothes, we use indigo due to its:
The energy stored in a watch spring is:
Which one of the following acids is used in battery?
The sensation of weightlessness in a spacecraft in an orbit is due to the:
‘Therm’ is the unit of:
Cream gets separated out of milk when it is churned. This is due to:
Newton’s first law of motion gives the concept of:
The process by which sun’s rays reach the earth is:
A pond of water appears less deep due to:
The oldest type of energy known to man is:
Water pipes in hilly areas often burst on a cold frosty night, beep use:
A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because:
Which of the following instruments is used to measure relative humidity?
The period of revolution of a geostationary satellite is:
The type of mirrors used in the headlamp of cars is:
The reason for a swimming pool to appear less deep than the actual depth is:
Alternating current is converted into direct current by a:
Flat footed camels can walk easily in sandy deserts because:
Which of the following is most elastic?
When a person walking in bright Sunlight enters a dark room, he is not able to see clearly for a little while because:
The swing of a spinning cricket ball in the air can be explained on the basis of:
The freezer in a refrigerator is fitted near the top:
Why two thin shirts can keep us warmer than a single thick shirt in winter?
Sound cannot pass through:
Water is not effective in extinguishing a fire caused by petrol because:
An egg sinks in soft water but floats in a concentrated solution of salt because:
What should a person on a freely rotating turn table do to decrease his (angular) speed?
Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy?
Which of the following circuit elements is used to block DC in an electronic circuit?
Spectacles used for viewing 3D films have:
A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls:
Detergents clean surface on the principle of: