How to Add a Current Source in COMSOL Multiphysics

To add a current source in COMSOL, follow these steps:

1. Open a new or existing model in COMSOL Multiphysics.

2. Click on the '+' button in the Model Builder to add a new component.

3. In the Component Library, navigate to the 'Electrical' section and click on 'Electric Currents'.

4. Drag and drop the 'Current Source' icon onto the model workspace.

5. In the Settings window, you can specify the properties of the current source, such as the magnitude and direction of the current, as well as its frequency and waveform. You can also specify where the current source is located in the model and how it is connected to other components.

6. Once you have defined the current source, you can run the simulation to see how it affects the behavior of the rest of the system.

Note: It is important to ensure that the current source is properly connected to the rest of the circuit or system in order to obtain accurate results.