Which one of the following expressions gives the magnitude of the vector ?

MATHEMATICS · Single correct · CBSE · Mathematics · Vector Algebra · Vector Algebra

Problem

Which one of the following expressions gives the magnitude of the vector

a\mathbf{i}+b\mathbf{j}+c\mathbf{k}

? (a)

\sqrt{ab+bc+ca}

(b)

a^{2}+b^{2}+c^{2}

(c)

\sqrt{a^{2}+b^{2}+c^{2}}

(d)

\sqrt{a^{2}+b^{2}}