Question

The magnitude of self cross product is ______.

Options

• zero

• magnitude of vector

• square of the magnitude of vector

• half the magnitude of vector

Answer 1

The magnitude of self cross product is zero.

Explanation:

The self cross product \[\vec A\] × \[\vec A\] = A² sin ⁡0° = 0, because the angle between a vector and itself is 0°, and sin⁡ 0° = 0.