JEE Main & Advanced Physics Vectors Question Bank Multiplication of Vectors

  • question_answer
    Two vector A and B have equal magnitudes. Then the vector A + B is  perpendicular to

    A)                 \[A\times B\]    

    B)                 A ? B

    C)                 3A ? 3B

    D)                 All of these

    Correct Answer: A

    Solution :

                        \[\vec{A}\times \vec{B}\] is a vector perpendicular to plane \[\vec{A}+\vec{B}\] and hence perpendicular to \[\vec{A}+\vec{B}\].


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