- Home
- Standard 11
- Physics
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