SSC General Science & Technology Sample Paper NCERT Sample Paper-1

  • question_answer
    Consider the following sentences:
    1. In ordinary bulbs only 5% to 10% electrical energy is converted into light energy.
    2. Tungsten has very high melting point as \[3422{}^\circ C\] the filament of bulb is made of it.
    3. The mica has good electrical resistance.
    4. The electric bulb was first invented by Thomas Alva Edison. Which of the above statements are correct?

    A)  1 and 3

    B)  3 and 4

    C)  All of these       

    D)  None of these

    Correct Answer: C

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