JEE Main & Advanced Physics Nuclear Physics And Radioactivity Question Bank Assertion and Reason

  • question_answer
    Assertion             :       According to classical theory, the proposed path of an electron in Rutherford atom model will be parabolic. Reason                 :       According to electromagnetic theory an accelerated particle continuously emits radiation.

    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: E

    Solution :

                According to classical electromagnetic theory, an accelerated charge continuously emits radiation. As electrons revolving in circular paths are constantly experiencing centripetal acceleration, hence they will be losing their energy continuously and the orbital radius will go on decreasing and form spiral and finally the electron will fall on the nucleus.


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