BCECE Engineering BCECE Engineering Solved Paper-2005

  • question_answer
    Which of the following is Heisenberg uncertainty principle?

    A) \[\Delta x.\Delta p\ge \frac{h}{4\pi }\]                  

    B) \[\Delta x.\Delta p=\frac{h}{4\pi }\]

    C) \[\Delta x.\Delta p\le \frac{h}{4\pi }\]

    D)        \[\Delta x.\Delta p<\frac{h}{4\pi }\]

    Correct Answer: A

    Solution :

    Key Idea: It is impossible to determine simultaneously the exact position and momentum of moving particle like electron, proton, neutron. \[\Delta x=\Delta p\ge \frac{h}{4\pi }\] Where \[\Delta \,x=\]uncertainty in position. \[\Delta \,p=\]uncertainty in momentum.


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