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CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2001

  • question_answer
    If\[\overrightarrow{a}.\hat{i}=\overrightarrow{a}.(\hat{i}+\hat{j}+\hat{k})=1,\]then\[\overrightarrow{a}\]is equal to:

    A)  \[\hat{i}\]                          

    B)         \[\hat{j}\]

    C)  \[\hat{k}\]                        

    D)         \[\hat{i}+\hat{j}\]

    E)  none of these

    Correct Answer: A

    Solution :

    \[\because \]\[\overrightarrow{a}.\hat{i}=1\] \[\Rightarrow \]\[\overrightarrow{a}\]is parallel to\[\hat{i}\] \[\therefore \]  \[\overrightarrow{a}=\hat{i}\]


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