Question:
\(\vec j\times\vec i=\) ?
\(\vec j\times\vec i=\) ?
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Cross product is anti-commutative: \(\mathbf{a}\times\mathbf{b}=-(\mathbf{b}\times\mathbf{a})\).
Updated On: Oct 17, 2025
- \(\vec k\)
- \(-\vec k\)
- \(\vec 0\)
- \(1\)
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The Correct Option is B
Solution and Explanation
Right–hand rule: \(\vec i\times\vec j=\vec k\). Swapping the order changes the sign:
\[
\vec j\times\vec i=-(\vec i\times\vec j)=-\vec k.
\]
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