> Use the 20 V scale on the voltmeter. > Use the 200 mA scale on the ammeter. > Within each one column, keep the same number of digits after the decimal point. > In the reverse direction, enter your currents and voltages as negative values. > Note #1: turn off the switch when not collecting measurements because the small resistors get hot. > Note #2: it is normal for no visible light to come out of the lightbulb when AV and I are small. Note #3: it is ok if the reading values of your ammeter occasionally fluctuate a little. Holding the ammeter probes firmly against the metal pieces they're touching helps reduce this. Forward polarity Reverse Polarity Control resistance Potential Current Current Potential Current Current difference through through difference through through (all series connections across the the across the the unless otherwise the lightbulb lightbulb lightbulb the lightbulb lightbulb lightbulb stated) AV (V) I (mA) I (A) AV (V) I (mA) I(A) 0 -- - 0.00 0 0.0 x 10-3 0.00 0 0.0 x 10 -3 1 3.3 kq x 10-3 x 10-3 2 1x3009 +2x2009 +2x1509 x 10-3 x 10-3 3 1x30092 +1x20092 +2x1509 x 10-3 x 10-3 4 1x30092 +0x20092 +2x1509 x 10-3 x 103 5 1x3009 +1x2009 x 10-3 x 10-3 6 2 x200 9 x 10-3 x 10-3 7 1 x300 9 x 10-3 x 10-3 B 1 x200 9 x 10-3 x 10-3 9 1 x100 9 x 10-3 x 10-3 10 2 x100 9 (parallel) x 10-3 x 10-3 11 2x10092+2x15092 (all parallel) x 10-3 x 10-3 12 none x 10-3 x 10-3