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Q. Which one of the following is determined by wet-bulb and dry-bulb thermometer?
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Q. An oil drop spreads over water because
Q. If a copper wire is increased to double its length, its resistance will become
Q. The star (other than the sun) visible to naked eyes is
Q. A small hole in the window forms an inverted image on the opposite wall due to
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Q. Which of the following is used for regulated electric supply ?
Q. The characteristic invalid for head radiation is that it travels :
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