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Motion in a Plane — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMotion in a Plane1 Mark
MCQ
If $\vec{\text{a}}_1$ and $\vec{\text{a}}_2$ are two non collinear unit vectors and $|\vec{\text{a}}_1+\vec{\text{a}}_2|=\sqrt{3},$ then the value of $(\vec{\text{a}}_1-\vec{\text{a}}_2).(2\vec{\text{a}}_1+\vec{\text{a}}_2)$ is:
  • A
    $2$
  • B
    $\frac{3}{2}$
  • ✓
    $\frac{1}{2}$
  • D
    $1$
✓

Answer

Correct option: C.
$\frac{1}{2}$

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