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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2000

  • question_answer
    In a face centred cubic cell, an atom at the face contributes to the unit cell:

    A)  1/4 part                              

    B)  1/8 part

    C)  1 part                                  

    D)  1/2 part

    Correct Answer: D

    Solution :

    In FCC unit cell, the atoms occupy all the eight corners of the cube and also the centre of the six faces of the cube. An atom at the centre of the face is shared by two unit cells. Therefore, it contributes \[\frac{1}{2}\] to a particular cell.


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