Gujarati
Hindi
3-1.Vectors
normal

Consider a vector $F =4 \hat{ i }-3 \hat{ j }$. Another vector perpendicular of $F$ is

A

$4 \hat{ i }+3 \hat{ j }$

B

$6 \hat{ i }$

C

$7 \hat{ k }$

D

$3 \hat{ i }-4 \hat{ j }$

Solution

(c)

The vector perpendicular to the $i$ and $j$ plane would be along the unit vector $k$. Another vector in $i$ and $j$ plane can be perpendicular to $\overrightarrow{ F }$

$(3 \hat{i}+4 \hat{j}) \perp(4 \hat{i}-3 \hat{j})$

But, from the options only $7 \hat{ k } \perp(4 \hat{i}-3 \hat{ j })$

Standard 11
Physics

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