Question

Which of the following vector identities is /are false?

• A.
• B.
• C.
• D.

Answer 1

Answer: (B), (C)

The correct options are
B
C

The scalar product is commulative, i.e. $\overrightarrow{A}.\overrightarrow{B}=\overrightarrow{B}.\overrightarrow{A}$. Vector product is anti-commutative, i.e. $\overrightarrow{A}\times \overrightarrow{B}=–\overrightarrow{B}\times \overrightarrow{A}$
Hence choices (b) and (c) are false.