1.

The unit vector along `vec(A)= 2 hat i + 3 hat j` is :A. `2 hat i+ 3 hat j`B. `(2i +3 j)/(2)`C. `(2i + 3j)/(13)`D. `(2i +3j)/(sqrt(13))`

Answer» Correct Answer - D
`vec(A)=2 hat(i)+3 hat(j)`
`hat(A)=(2i+3j)/(sqrt(4+9))=(2i+3j)/(sqrt(13))`.


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