Vectors — Easy JEE math MCQ
The magnitude of vector $\vec{a} = 3\hat{i} + 4\hat{j}$ is:
- A. $5$
- B. $7$
- C. $1$
- D. $\sqrt{7}$
Solution
$|\vec{a}| = \sqrt{3^2 + 4^2} = \sqrt{9 + 16} = \sqrt{25} = 5$
MATH
easy • PYQ Reworded
Question
Read carefully, then pick the best option.
The magnitude of vector is:
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