First slide

Vectors

Question

$A vector perpendicular to both the vectors 2 \hat{i} - 3 \hat{j} and 3 \hat{i} - 2 \hat{j} is$

Easy

A

$\hat{j} + 5 \hat{k}$
B

$\hat{j} - 5 \hat{k}$
C

$\hat{i} + \hat{j} - 5 \hat{k}$
D

$7 \hat{k}$

Solution

$\begin{array}{l} Dot product of 7 \hat{k} with the given vectors is zero. \\ Hence it is perpendicular to both the given vectors. \end{array}$

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