Q. The instrument which uses sound waves to measure the depth of oceans is
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Q. What should be the angle between force and displacement for maximum work to be done?
Q. Which of the following is an insulator?
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Q. Which type of fan used between dust collector and chimney in thermal power plant ?
Q. Which of the following effects is not produced by current?
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Q. Electricity is transmitted over long distances
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Q. The minimum length of a plane mirror where one can see his full image is
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