Current Density - Practice Questions & MCQ

1.  Current density

• Current density: The amount of electric current flowing per unit cross-sectional area of a material.

• It is a vector quantity.

If a current of flows through an area the  average current density in the direction of current

At point P :

  in the direction of current

2. If current not Perpendicular to Area

is the angle between the normal to the area and direction of current

• If the current density   is uniform for a normal cross-section then

• Unit and dimension -

Unit of current density is 

DImension of current density is