Define unit vector.

What is a null vector? Define a unit vector.

Define (i) unit vector (ii) null vector (iii) cross product of two vectors vec A and vec B .

(A) : hati+hatj is not a unit vector (R) : The addition of unit vectors never gives unit vector

Define the Vector

Define Orthogonal unit vectors.

Define a vector and a unit vector. Find in terms of vector vec(a) a unit vector in its direction.

Define current density vector. Write its S.I. units.

If the sum of two unit vectors is also a unit vector. Then magnituce of their difference and angle between the two given unit vectors is