Part IV: Transformers Now, unplug all previous instruments, and just look at the oscilloscope, function generator, and solenoid coils. You will now be wiring these things together (always red to red and black to black, of course). First, insert the smaller coil within the larger solenoid coil, and the steel bar inside the coil. Next, wire the function generator to channel 2 of the oscilloscope. Then, in parallel with Cha 2 of the oscilloscope (so with two more wires), wire the function generator to the large coil, as well. It is best to use the 1500 turns port here. Finally, wire the small coil to channel 1 of the oscilloscope. Now, unpress the "XY" button, and set the oscilloscope VERT MODE to DUAL. If you turn on the function generator (and have it set to a sine wave), you should now observe two sine waves on your screen, one for each coil. 4 Vary the TIME/DIV and VOLTS/DIV knobs, as well as the POS knobs, until both waves show are completely on screen and show 2-5 full periods. Note that the TIME/DIV controls both waves, but the VOLTS/DIV knobs are separate for each. Sketch the screen of the oscilloscope. Be sure to label the waves as to which is the small or large coil (tweak the POS knobs and see which one moves), and record this on your sketch. For this sketch, you may have two different VOLTS/DIV settings, which complicates your yaxis labels. A good way to draw this is to put the CH1 voltages on the left-hand side of the plot, and the CH2 voltages on the right-hand side. Measure the peak-to-peak amplitude of each wave (using the corresponding VOLTS/DIV settings). Record the amplitude of the wave for the larger coil as Vl and the amplitude of the wave for the smaller coil as V2 (with uncertainties). Note how many turns you are using in your larger coil as N1, and take N2 = 175. Take 1 turn as the uncertainty in the number of turns. Finally, take out the steel bar, and repeat this measurement