engineering recuitment UPCL AE (E&M) 2021 Mock Test Electromagnetic Theory Vector Calculus Vector Algebra
दो सदिश \(\overrightarrow a - \overrightarrow b\) और \(\overrightarrow a + \overrightarrow b \) पर पार गुणनफल \(\left( {\overrightarrow a - \overrightarrow b } \right) \times \left( {\overrightarrow a + \overrightarrow b } \right)\) का मान क्या है?
1
a2 - b2
2
\(2(\overrightarrow a \times \overrightarrow b)\)
3
\(\overrightarrow a \times \overrightarrow b \)
4
\(\overrightarrow b \times \overrightarrow a\)