SSC General Science & Technology Sample Paper NCERT Sample Paper-6

  • question_answer
    Which one of the following electromagnetic waves is used by the Bluetooth to exchange data over short distances?

    A)  Microwave       

    B)  Radiowave

    C)  X-rays 

    D)  UV-rays

    Correct Answer: B

    Solution :

    [b] Bluetooth is a wireless technology standard for exchanging data over short distances (using short- wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994, it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization.

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