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    Question

    Inactive Nitrogen and Argon gases are usually used in

    electric bulbs in order to
    A Increase the intensity of light emitted Correct Answer Incorrect Answer
    B Increase the life of the filament Correct Answer Incorrect Answer
    C Make the emitted light coloured Correct Answer Incorrect Answer
    D Make the production of bulb economical Correct Answer Incorrect Answer

    Solution

    The inert gas within the bulb prevents the filament from evaporating. Thus, it increases. 

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