MCQ
The unit vector along $\hat{i}+\hat{j}$ is
- A$\hat{k}$
- B$\hat{i}+\hat{j}$
- ✓$\frac{\hat{i}+\hat{j}}{\sqrt{2}}$
- D$\frac{\hat{i}+\hat{j}}{2}$
✓
Answer
Correct option: C.
$\frac{\hat{i}+\hat{j}}{\sqrt{2}}$
(c) $\hat{R}=\frac{\vec{R}}{|R|}=\frac{\hat{i}+\hat{j}}{\sqrt{1^2+1^2}}=\frac{1}{\sqrt{2}} \hat{i}+\frac{1}{\sqrt{2}} \hat{j}$
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