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Q. A temperature difference of 25°C is equivalent to a temperature difference of
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Q. For the rear view, motorists use
Q. Which among the given waves cannot be polarised
Q. The word ''insolation' means
Q. When mechanical waves have a frequency below the audible range, these are called
Q. Kerosene oil rises up in a wick of a lantern because of
Q. Convex lenses are used for the correction of
Q. Which tube used to produce X-ray?
Q. A galvanometer can be converted to a voltmeter by connecting
Q. The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as –
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