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Q. Materials for rain-proof coats and tents owe their water proof properties to
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Q. The following is measured in tonne of oil equivalent (toe) ?
Q. Which scientist first melted two pieces of ice by rubbing them together?
Q. Which of the given waves is used for communication by artificial satellites
Q. In which of the following equipments, current rating is not necessary ?
Q. Stars appears to move from east to west because
Q. Direct Current produces a magnetic field similar to a permanent magnet. This magnetic field:
Q. A capacitor (condenser) is used in an electrical circuit in order to
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