For vector a (a i)^2+(a j)^2+(a k)^2= _________. - Vidyadip

MCQ

For vector $\vec{a}$$
(\vec{a} \times \hat{i})^2+(\vec{a} \times \hat{j})^2+(\vec{a} \times \hat{k})^2=
$ _________.

A
$4|a|^2$
B
$3|\vec{a}|^2$
C
$|\vec{a}|^2$
D
$2|\vec{a}|^2$

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Answer

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