The expression $\left( {\frac{1}{{\sqrt 2 }}\hat i + \frac{1}{{\sqrt 2 }}\hat j} \right)$ is a
Unit vector
Null vector
Vector of magnitude $\sqrt 2 $
Scalar
If $\vec P = \vec Q$ then which of the following is NOT correct
Pick out the two scalar quantities in the following list :
force, angular momentum, work, current, linear momentum, electric field, average velocity, magnetic moment, relative velocity.
How the magnitude of vector quantity is represented ?
Which of the following is a vector
When it is needed to use vector ?