Which of the following statements is true?

Options

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 4hat(j)` is 12

Answer

B

Explanation

Rotation of axis does not change vector magnitude