RAJASTHAN ­ PET Rajasthan PET Solved Paper-2002

  • question_answer
    For good emissive should be

    A)  small work function and small melting point

    B)  small work function and high melting point

    C)  high work function and high melting point

    D)  high work function and small melting point

    Correct Answer: B

    Solution :

     The good emitter have maximum melting point and minimum work function.


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