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NEET Sample Paper NEET Sample Test Paper-2

  • question_answer
    A p-type semiconductor has acceptor level \[57\text{ }MeV\] above the valence band. The maximum wavelength of light required to create a hole is:

    A)  \[57\,A\]             

    B)  \[57\times {{10}^{-3}}\overset{o}{\mathop{A}}\,\]

    C)  \[217100\overset{o}{\mathop{A}}\,\]         

    D)  \[11.61\times {{10}^{-33}}\overset{o}{\mathop{A}}\,\]

    Correct Answer: C

    Solution :

    As,    \[E=\frac{hc}{\lambda }\] \[\Rightarrow \]  \[\lambda =\frac{12375}{E(eV)}\overset{o}{\mathop{A}}\,=\frac{12375}{57\times {{10}^{6}}}=217100\overset{o}{\mathop{A}}\,\]


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