The expression `(1/(sqrt(2))hat(i)+1/(sqrt(2))hat(j))` is a

Options

A. unit vector
B. unll vector
C. vector of magnitude`sqrt(2)`
D. Scalar

Answer

A

Explanation

(a) Let `A=(1) /(sqrt(2))hati+(1)/(sqrt(2))hatj`
`|A|=sqrt(((1)/(sqrt(2)))+((1)/(sqrt(2)))^(2))=sqrt((2)/(2))=1`
As the magnitude o fgiven vetor is 1.
`therfore ` It is a unit vector.`