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Q. Doppler effect is independent of
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Q. What is the name of the device used to convert alternating current into direct current -
Q. A flat mirror has a minimum height to see a full reflection of a person.
Q. The unit of noise pollution (level) is:
Q. Short sightedness can be corrected by
Q. The amount of heat required to raise the tempreature of a body through 1 k is called, its
Q. The nucleus of an atom contains
Q. A small drop of oil spreads over water because :
Q. For a ray of light to suffer total internal reflection it has to pass from
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