Question

The vector equation of the x-axis is given by
A. `vec(r ) =hat(i)`
B. `vec(r )=hat(j) +hat(k)`
C. `vec(r ) =lambdahat(i)`
D. none of these

Answer 1

Correct Answer - C
Note that the Cartesian equation of x-axis is `(x-0)/(1)=(y-0)/(0)=(z-0)/(0)` and its vector equations is `vec( r) = lambda hat(i)`