If i, j, k are unit vectors along three mutually perpendicular di… - Vidyadip

MCQ

If $\hat{i}, \hat{j}, \hat{k}$ are unit vectors along three mutually perpendicular directions, then

A
$\hat{i} \cdot \hat{j}=1$
B
$\hat{i} \times \hat{j}=1$
C
$\hat{ i } \cdot \hat{ k }=0$
D
$\hat{ i } \times \hat{ k }=0$

✓

Answer

Since, $\hat{i}, \hat{j}, \hat{k}$ are mutually perpendicular to each other.
$
\therefore \hat{ i } \cdot \hat{ k }=0
$

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