A vector is represented by $3\,\hat i + \hat j + 2\,\hat k$. Its length in $XY$ plane is
A vector is represented by $3\,\hat i + \hat j + 2\,\hat k$. Its length in $XY$ plane is
- A
$2$
- B
$\sqrt {14} $
- C
$\sqrt {10} $
- D
$\sqrt 5 $
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How the magnitude of vector quantity is represented ?
How the magnitude of vector quantity is represented ?
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