The net electric current in arc is

The net electric current in an arc is determined by the voltage across the arc and the resistance of the arc. Here are the steps to calculate it:

1. Identify the Voltage Across the Arc: This is the potential difference that is causing the electric current to flow. It can be found using a voltmeter.

2. Identify the Resistance of the Arc: The resistance of the arc can be calculated using Ohm's law, which states that the resistance is equal to the voltage divided by the current. If the current is known, the resistance can be calculated. If not, it may need to be estimated based on the properties of the materials involved.

3. Calculate the Current: Once the voltage and resistance are known, the current can be calculated using Ohm's law, which states that the current is equal to the voltage divided by the resistance.

Please note that this is a simplified explanation. The actual calculation may be more complex depending on the specific circumstances, such as the presence of magnetic fields or changes in temperature.