Vector product of two vectors 2 i , + , j , and i , + ,2 j , is - Vidyadip

MCQ

Vector product of two vectors $2\hat i\, + \,\hat j\,$ and $\hat i\, + \,2\hat j\,$ is

A
$\hat k\, + \,\hat j\,$
B
$\hat i\, + \,\hat j\,$
✓
$3\hat k$
D
$2\hat i$

✓

Answer

Correct option: C.

$3\hat k$

c
$(2\hat i\, \times \,\hat j)\, \times \,\,(\hat i\, + \,2\hat j)\, = \,4\hat k\, - \,\hat k\, = \,\,3\hat k$

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