The second experiment is also about observing magnetic fields, but this time from a current in a coil of wire. There should be a coil of “magnet wire” in your kit. It looks like thin wire with some varnish insulation on it. Warning: The resistors in this experiment can get hot very quickly. Don’t leave it connected to the battery for long. Step 1: Making the magnetic coil Unroll enough of the wire to make a coil of about 50 turns—you can do this easily by wrapping the wire around your hand. Take a knife and scrape the varnish insulation off the ends of the wire in your coil. Attach one end of the coil to one of the battery terminals (polarity is not an issue here), and wrap a 20 ohm resistor around the post on the other terminal. Do not close the circuit yet. Step 2: Connecting the DVM Warning: Because this experiment will get hot very quickly, don’t leave it connected to the battery for long. Make the connection very briefly, just long enough to see the filings move. Plug the DVM probes into the COM and 10A inputsSwitch the dial to 10 A in the DC A section Connect one probe to the battery and the other to the resistor. The current should flow from the battery, through the coil, through the resistor, through the DVM, and back into the battery. Step 3: Measuring the magnetic field Bring iron-filings card near the coil.Unhook your circuit and then sketch what you see in the filings.Reconnect your circuit. Change the orientation of the card with respect to the coil to find a different set of field lines. Unhook your circuit and then sketch what you see in the filings.