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JEE Main & Advanced Physics Vectors Question Bank Multiplication of Vectors

  • question_answer
    Let \[\overrightarrow{A}=\hat{i}A\,\cos \theta +\hat{j}A\,\sin \theta \] be any vector. Another vector \[\overrightarrow{B}\] which is normal to A is                                    [BHU 1997]

    A)                 \[\hat{i}\,B\,\cos \theta +j\,B\sin \theta \]

    B)                             \[\hat{i}\,B\,\sin \theta +j\,B\cos \theta \]

    C)                 \[\hat{i}\,B\,\sin \theta -j\,B\cos \theta \]          

    D)                 \[\hat{i}\,B\,\cos \theta -j\,B\sin \theta \]

    Correct Answer: C

    Solution :

                        Dot product of two perpendicular vector will be zero.


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