JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Assertion and Reason

  • question_answer
    Assertion             :       Photosensitivity of a metal is high if its work function is small. Reason                 :   Work function \[=h{{f}_{0}}\] where \[{{f}_{0}}\] is the threshold frequency. [AIIMS 1997]

    A)             If both assertion and reason are true and the reason is the correct explanation of the assertion.

    B)             If both assertion and reason are true but reason is not the correct explanation of the assertion.

    C)             If assertion is true but reason is false.

    D)             If the assertion and reason both are false.

    E)             If assertion is false but reason is true.

    Correct Answer: B

    Solution :

                 Less work function means less energy is required for ejecting out the electrons.


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