Ball pen works on the principle of ______.
Answer: D
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Optical fibre works on the
Answer: B
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SI unit of temperature is
Answer: A
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Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water
Answer: C
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A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will
Answer: C
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The direction of heat flow between two objects depends on
Answer: C
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Which is best used as a sound absorbing material in partition walls ?
Answer: C
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The Length of the Day is determined in
Answer: C
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Out of the following, which is not emitted by radioactive substance?
Answer: D
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On which day ' National Science Day ' is celebrated in India ?
Answer: D
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