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JEE Main & Advanced Physics Vectors Question Bank Multiplication of Vectors

  • question_answer
    If \[\overrightarrow{P}.\overrightarrow{Q}=PQ,\]then angle between \[\overrightarrow{P}\]and \[\overrightarrow{Q}\] is             [AIIMS 1999]

    A)                 0°           

    B)                 30°

    C)                 45°         

    D)                 60°

    Correct Answer: A

    Solution :

                        \[\cos \theta =\frac{\vec{P}.\vec{Q}}{PQ}=1\]\ \[\theta =0{}^\circ \]


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