Question

The magnitude of vector product of two vectors $\overline{P}\times \overline{Q}$ may be:

• A. equal to PQ
• B. less than PQ
• C. equal to zero
• D. all the above

Answer 1

The correct option is D all the above

$|\overline{P}\times \overline{Q}|=|\overline{P}\overline{Q}sin\theta |$
where $\theta$ is angle between P and Q
and we know that sin$\theta$ lies between 1 and -1
so $|\overline{P}\times \overline{Q}|$ lies between -PQ and PQ
Hence, option D is correct.