Vector Magnitude Characteristics

The magnitude of a vector represents its length or size. It is fundamentally a scalar value, meaning it only has magnitude and no direction.

Analyzing Magnitude Options

• Cannot be Negative: Magnitude corresponds to length, which must always be non-negative ($ \ge 0 $). Therefore, a negative quantity is not possible for a vector's magnitude.
• Cannot be Angular: Magnitude measures size, not orientation. An angular quantity describes an angle, which is a different concept.
• Can be Zero or Positive: The magnitude is zero only for the special case of the zero vector ($ \vec{0} $). For any non-zero vector, the magnitude is strictly positive.

Considering these points, a vector's magnitude is always a non-negative value. Among the given options, "Positive quantity" best describes this characteristic, representing the length of non-zero vectors and excluding impossible negative or angular values.