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Q. In the remote control of television, electromagnetic waves used are
All electromagnetic waves used are infrared.
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Q. Moving electric charge produces:
Q. Purity of a metal can be determined with the help of
Q. In our houses we get 220V ac. The value 220 represents
Q. Forged documents are detected by
Q. The S.I. unit of electric charge is :
Q. Water has maximum density at
Q. A copper disc has a hole. If the disc is heated, the size of the hole
Q. Which of the following devices can be used to detect radiant heat ?
Q. The angular momentum of a satellite depends on which of the following?
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