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3-1.Vectors
easy
$(\overrightarrow A - \overrightarrow B )$ तथा $(\overrightarrow A \times \overrightarrow B )$ सदिशों के बीच कोण है $(\overrightarrow{ A } \neq \overrightarrow{ B })$
A
$120$
B
$45$
C
$90$
D
$60$
(NEET-2017)
Solution
$\overrightarrow{ A }, \overrightarrow{ B }, \overrightarrow{ A }-\overrightarrow{ B }$ are in same plane. $\overrightarrow{ A } \times \overrightarrow{ B }$ is perpendicular to the plane of $\vec{A}, \vec{B}$ and $\vec{A}-\vec{B}$ then angle between $\vec{A}-\vec{B}$ and $\overrightarrow{ A } \times \overrightarrow{ B }$ is $90^{\circ}$.
Standard 11
Physics