Circuit Diagram Direction Of Current. Adjust the variable resistor so that the potential difference is very low or zero at the start. A current in a wire or circuit element can flow in either of two directions.
When defining a variable to represent the current the direction representing positive current must be specified usually by an arrow on the circuit schematic diagram. In this project we control direction and speed of a 24v high current motor using arduino and two relaysno power switches are needed for this circuit just two push buttons and in potentiometer to control the direction and speed of dc motorone push button will rotate motor clockwise and other will rotate it counter clockwise. Electric current flows from negative end of battery to positive end questions.
The si unit of charge is coulomb and measurement of electric current happens in units of coulomb per second which is ampere.
The conventional current in the external circuit is the direction that a positive charge would move. The si unit of charge is coulomb and measurement of electric current happens in units of coulomb per second which is ampere. Digging deeper into the physics there are actually two possible types of current. An ammeter measures current and a voltmeter measures a potential difference.