Gujarati
3-1.Vectors
medium

दो सदिश $\mathop A\limits^ \to $तथा $\mathop B\limits^ \to $ इस प्रकार हैं कि $\mathop A\limits^ \to + \mathop B\limits^ \to = \mathop A\limits^ \to - \mathop B\limits^ \to $ तब

A$\mathop A\limits^ \to \,.\,\mathop B\limits^ \to = 0$
B$\mathop A\limits^ \to \times \mathop B\limits^ \to = 0$
C$\mathop A\limits^ \to = 0$
D$\mathop B\limits^ \to = 0$

Solution

$\vec{A}+\vec{B}=\vec{A}-\vec{B}$
$(\vec{A}-\vec{A})+\vec{B}+\vec{B}=0$
$0+2\vec{B}=0$
$\vec{B}=0$
Standard 11
Physics

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