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Questions  >>  CBSE XII  >>  Math  >>  Vector Algebra
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Q)

If $\overrightarrow a$ is a nonzero vector of magnitude $" a "$ and $λ$ a nonzero scalar, then $λ \overrightarrow a$ is unit vector if

\[ \begin{array} (A)\; λ = 1 \quad & (B)\; λ = -1 \quad & (C)\; a = |\; λ\; | \quad & (D)\; a = 1/|\; λ\; | \end{array} \]

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