First slide

Vectors

Question

A vector perpendicular to $(4 \vec{i} - 3 \vec{j})$ is

Very Easy

A

$4 \vec{i} + 3 \vec{j}$
B

$7 \vec{k}$
C

$6 \vec{i}$
D

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

Solution

For two vectors to be perpendicular to each other $\vec{A} . \vec{B} = 0$
Since $\vec{A} = (4 \hat{i} - 3 \hat{j})$ so,
$\vec{B} = (3 \hat{i} - 4 \hat{j})$ will be the other vector suitable in the given options.

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