What is current density (J)?
Answers
Answer:
In the field of electromagnetism, Current Density is the measurement of electric current (charge flow in amperes) per unit area of cross-section (m2). This is a vector quantity, with both a magnitude (scalar) and a direction. J = I/A. J = current density in amperes/m2. I = current through a conductor, in amperes.
Current strength, in a conductor, can be defined as the rate of flow of charge across any cross-section of the conductor. An electric current is usually considered as a flow of electrons. When two ends of a battery are connected to each other by using metal wire, electrons flow out of one end of the battery, through the wire, and into the other end of the battery. Current is usually steady if its magnitude is constant and its direction will always be the same.