alleryIf $\hat{i}$, $\hat{j}$, $\hat{k}$ are right-handed orthogonal unit vectors, then $\hat{i} \times \hat{j}$ equals:
A$\hat{i}$
B$\hat{j}$
C$\hat{k}$
D$-\hat{k}$
Answer & Solution
Correct answer: C. $\hat{k}$
By the right-hand rule for the cross product, $\hat{i} \times \hat{j} = \hat{k}$.
The cyclic order i → j → k gives the positive sign.
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