Question

Which of the following statements is true?

• A. When the coordinate axes are translated the component of a vector in a plane changes
• B. When the coordinate axes are rotated through some angle components of the vector change but the vector's magnitude remains constant
• C. Sum of $\vec{a}$ and $\vec{b}$ is $\vec{R}$ . If the magnitude of $\vec{a}$ alone is increased angle between $\vec{b}$ and $\vec{R}$ decreases
• D. The cross product of $3\hat{i}$ and $4\hat{j}$ is 12

Answer 1

Answer: (B)

When coordinate axes are rotated through some angle components of the vector change but the vectors magnitude remains constant.