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JEE Main & Advanced Physics Vectors Sample Paper Topic Test- Vectors

  • question_answer
    If two vectors \[2\hat{i}\,+3\hat{j}\,+\,\hat{k}\] and \[-4\hat{i}\,-6\hat{j}\,-\lambda \hat{k}\] are parallel to each other, then value of \[\lambda \] is

    A) 0

    B) 2

    C) 3

    D) 4

    Correct Answer: B

    Solution :

    [b] The coefficient of \[\hat{i},\,\hat{j}\] and \[\hat{k}\] should bear a constant ratio. or         \[\frac{2}{-4}\,=\frac{3}{-6}\,=\frac{1}{-\lambda }\].


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