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Vector or Cross Product — Maths STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceMathsVector or Cross Product1 Mark
MCQ
If $\vec{\text{a}}$ is any vector, then $\big(\vec{\text{a}}\times\hat{\text{i}}\big)^2+\big(\vec{\text{a}}\times\hat{\text{j}}\big)^2+\big(\vec{\text{a}}\times\hat{\text{k}}\big)^2=$
  • A
    $\vec{\text{a}}^2$
  • ✓
    $2\vec{\text{a}}^2$
  • C
    $3\vec{\text{a}}^2$
  • D
    $4\vec{\text{a}}^2$
✓

Answer

Correct option: B.
$2\vec{\text{a}}^2$
$2\vec{\text{a}}^2$

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