Question

Position of a particle in a rectangular co-ordinate system is $(3,2,5)$. Then its position vector will be

• A. $3\hat{i}+5\hat{j}+2\hat{k}$
• B. $3\hat{i}+2\hat{j}+5\hat{k}$
• C. $5\hat{i}+3\hat{j}+2\hat{k}$
• D. $\text{None of these}$
  

Answer 1

The correct option is B $3\hat{i}+2\hat{j}+5\hat{k}$

If a point has coordinate $(x,y,z)$ then its position vector is written as
$\overrightarrow{r}=x\hat{i}+y\hat{j}+z\hat{k}$
Here, the given co-ordinate is $(3,2,5)$, thus the position vector is
$\overrightarrow{r}=3\hat{i}+2\hat{j}+5\hat{k}$