VectorHard
Question
Which of the following expressions are meaningfull question ?
Options
A.
B.
C.
D.
Solution
(a) 
is a meaningful operation.
Therefore, (a) is the answer.
is not meaningful since 
is a scalar quantiy and for dot product quantities should be vector.
Therefore, (b) is not the answer.
(c)
is meaningful since it is a simple mulyiplication of vector and scalar quantity. Therefore, (c) is the answer
(d)
is not meaningful since is a scalar quantity and for cross product quantities be vector.
Therefore, (b) is not the answer.
is a meaningful operation.Therefore, (a) is the answer.
is not meaningful since is a scalar quantiy and for dot product quantities should be vector.Therefore, (b) is not the answer.
(c)
is meaningful since it is a simple mulyiplication of vector and scalar quantity. Therefore, (c) is the answer (d)
is not meaningful since is a scalar quantity and for cross product quantities be vector.Therefore, (b) is not the answer.
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