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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-31

  • question_answer
    There are four semiconductors A, B, C and D with respective Band gaps of \[3eV,\,2eV,\,1eV\] and \[0.6\] sec for use inphotodetector to detect \[14000\,\overset{0}{\mathop{A}}\,\] Select suitable semiconductor.

    A) A                                            

    B) B

    C) C                                            

    D) D

    Correct Answer: D

    Solution :

    To use as photodetector \[{{E}_{g}}<\frac{hc}{\lambda }=\frac{12400}{14000}=0.89\,\,eV\]                 Hence, appropriate is D.


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