Question:
\(\vec i\cdot\vec i=\) ?
\(\vec i\cdot\vec i=\) ?
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$\vec i\cdot\vec i=\vec j\cdot\vec j=\vec k\cdot\vec k=1$; mixed pairs are \(0\).
Updated On: Oct 17, 2025
- \(0\)
- \(1\)
- \(-1\)
- \(\vec j\)
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The Correct Option is B
Solution and Explanation
Unit vectors have length \(1\) and are mutually perpendicular. Dot product of a vector with itself equals the square of its length:
\[
\vec i\cdot\vec i=\|\vec i\|^{2}=1^{2}=1.
\]
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