Electromagnet Strength Investigation Link for simulation: https://phet.colorado.edu/en/simulations/magnets-and-electromagnets Set up your window to the "Electromagnet" simulation Make sure your "Show Field Meter" and "Show Field" are both selected, and you are using a DC power source. Part 1: Pre-Lab Knowledge 1. Draw the circuit diagram for a single-cell battery connected with a coil of wire. Label the positive and negative ends of the battery, and draw the direction and poles of the coil's magnetic field