JEE Mains · Physics · STD 11 - 3.1 vectors
\(\vec{A}\) is a vector quantity such that \(|\vec{A}|=\) nonzero constant. Which of the following expressions is true for \(\vec{A}\) \(?\)
- A \(\overrightarrow{ A }\cdot \overrightarrow{ A }=0\)
- B \(\overrightarrow{ A } \times \overrightarrow{ A }<0\)
- C \(\overrightarrow{ A } \times \overrightarrow{ A }=0\)
- D \(\overrightarrow{ A } \times \overrightarrow{ A }>0\)
Answer & Solution
Correct Answer
(C) \(\overrightarrow{ A } \times \overrightarrow{ A }=0\)
Step-by-step Solution
Detailed explanation
\(|\overrightarrow{ A }| \neq 0\) \(\overrightarrow{ A } \times \overrightarrow{ A }=|\overrightarrow{ A }||\overrightarrow{ A }| \sin 0^{\circ} \hat{ n }=0\)
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