CONVENTION FOR CURRENTS
IT IS ABSOLUTELY NECESSARY TO INDICATE
THE DIRECTION OF MOVEMENT OF CHARGED
PARTICLES.
THE UNIVERSALLY ACCEPTED CONVENTION IN
ELECTRICAL ENGINEERING IS THAT CURRENT IS
FLOW OF POSITIVE CHARGES.
AND WE INDICATE THE DIRECTION OF FLOW
FOR POSITIVE CHARGES
-
THE REFERENCE DIRECTION-
A POSITIVE VALUE FOR
THE CURRENT INDICATES
FLOW IN THE DIRECTION
OF THE ARROW (THE
REFERENCE DIRECTION)
A NEGATIVE VALUE FOR
THE CURRENT INDICATES
FLOW IN THE OPPOSITE
DIRECTION THAN THE
REFERENCE DIRECTION
THE DOUBLE INDEX NOTATION
IF THE INITIAL AND TERMINAL NODE ARE
LABELED ONE CAN INDICATE THEM AS
SUBINDICES FOR THE CURRENT NAME
POSITIVE CHARGES
FLOW LEFT-RIGHT
POSITIVE CHARGES
FLOW RIGHT-LEFT