alleryFor mutually perpendicular unit vectors, i cross j equals:
AThe vector k
BThe vector i
CThe vector j
DThe zero vector
Answer & Solution
Correct answer: A. The vector k
1. The unit vectors along the axes form a right handed system.
2. Crossing the first two gives the third.
3. So i cross j equals k.
_Source: syllabus Mathematics Part II, Chapter 10, Vector Algebra._
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