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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2013

  • question_answer
        The number of vectors of unit length perpendicular to the vectors\[a=i+j\]and \[b=j+k,\]is

    A)  1                            

    B)  2

    C)  4                            

    D)  Infinite

    Correct Answer: B

    Solution :

                    Required vectors are given by \[\pm \frac{a\times b}{|a\times b|}\]. Hence, there are two vectors.


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