5/26 Resistor and Inductor Circuits (RL Circuits)

We found that the color combination for a 100 ohm resistor was brown black brown. In red, we found the resistivity of an 18 gauge copper resistor by using the formula R = rho * L / Area and finding each variable to find R. We then calculated for the time constant, Tau. We were then given an inductor with a given inductance and asked to find the time constant. We found that the total resistance is 100 ohms plus 50 ohms from the resistance inside the oscilloscope.

We were given an inductor with 440 turns. We measured its length, area inductance and resistivity and plugged it into the  provided formula to find our theoretical results in red. We then used the oscilloscope to find our experimental values. We found that the calculated number of turns was about 70 turns off from our given 440 turns. Because of this inaccuracy, we had uncertainties in our inductance value and halftime.

In purple on the top left, we put in our own words what we thought Faraday's Law of Induction was. We were then given a circuit consisting of a battery, 2 resistors and 1 inductor. We calculated our max current for I2 and I3. Since the max of I1 is the sum of I2 and I3, we did not put that on the board. We then found current at 170 milliseconds. We used the time constant we calculated for in light blue on the top right to find current at a certain time. We then calculated for what the voltage would be if the voltage before the inductor is 11 volts. We found that the voltage in the inductor is 34 volts.