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JEE Main & Advanced Physics Vectors Question Bank Multiplication of Vectors

  • question_answer
    . Angle between the vectors \[(\hat{i}+\hat{j})\] and \[(\hat{j}-\hat{k})\] is

    A)                 90°         

    B)                 0°

    C)                 180°      

    D)                 60°

    Correct Answer: D

    Solution :

                        \[\cos \theta =\frac{\vec{A}.\vec{B}}{|\vec{A}||\vec{B}|}=\frac{1}{\sqrt{2}\sqrt{2}}=\frac{1}{2}\]\\[\theta =60{}^\circ \]


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