VectorMedium
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.
Create a free account to view solution
View Solution FreeMore Vector Questions
Let $\overrightarrow{a} = 4\widehat{i} - \widehat{j} + 3\widehat{k},\overrightarrow{b} = 10\widehat{i} + 2\widehat{j} - ...If l1 and l2 are lengths of the vectors î + 2ĵ + and î + 5ĵ respectively, then-...Vectors and are inclined at an angle θ = 120o. If || = 1, || = 2, then [(+ 3) × (3−)]2 is equal to-...If the non zero vectors are perpendicular to each other then the solution of the equation, is -...If , and (3 − 2) are position vectors of three points, then points are-...