SSC General Science & Technology Sample Paper NCERT Sample Paper-3

  • question_answer
    Consider the following statements:
    1. Microwave ovens are used for cooking purposes
    2. Microwave are used in Radar system for aircraft navigation
    3. A radar using microwave can help in detecting the seed of tennis ball, cricket ball, automobile while in motion. Which of the statements given above are correct?

    A)  2 and 3

    B)         1 and 2

    C)  1 and 3

    D)  1, 2 and 3

    Correct Answer: D

    Solution :

    [d] Radar uses microwave radiation to detect the range, speed, and other characteristics of remote objects. Development of radar was accelerated during World War II due to its great military utility. Now radar is widely used for applications such as air traffic control, weather forecasting, navigation of ships, and speed limit enforcement.

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