Pre-lab, Task # 3: Using Figur 2 with Vin =10 V p-p and R-10 kn, and assuming that the reactance of the inductor is much smaller than 10k and can be ignored, determine the circulating current and record in Table 4. isource(p-p) Reoil of 10 mH 1mA Reoil of 1 mH Vin Tabell 4 ли + Vout Figur 2: The schematic of an RL circuit. 6 Pre-lab, Task #4: Consider the circuit of Figur 2 using R-10 kn, and L-10 mH and Vin as a 1000 Hz sine wave and 10 V p-p. Calculate the theoretical value of XL, and record in Table 5. Assume that the frequency of the input wave changes taking the values listed in Table 5, calculate the XL for them as well and record them in the table. 1. Build the circuit of Figur 2 using R-10 k2, and L-10 mH. Place one cable across the generator and another across the inductor. Set the generator to a 1000 Hz sine wave and 10 V p-p. Make sure that the Bandwidth Limit of the oscilloscope is engaged for both channels. This will reduce the signal noise and make for more accurate readings. measure the DC coil resistances of the inductors using an ohmmeter or DMM and record in Table 4. 2. Record the peak-to-peak inductor voltage and record in Table 5. 3. Using the source current from Table 4 and the measured inductor voltage, determine the experimental reactance and record it in Table 5. Also compute and record the deviation. 4. Repeat steps three through five for the remaining frequencies of Table 5. 5. Replace the 10 mH inductor with the 1 mH unit and repeat steps two through six, recording results in Table 6. 6. Using the data of Table 5 and Table 6, create plots of inductive reactance versus frequency. Frequency (Hz) XL Theory VLp-p) Exp XL Exp % Deviation 10k 628 631 20k 1256 1,25 30k 1884 1186 40k 2512 2,45 50k 3140 3.01 60 k 3768 3.53 80 k 5024 4H8 100 k 6280 5.35 Tabell 5: Inductive reactances for L-10mH 7 Frequency (Hz) XL Theory V-p) Exp XL Exp % Deviation 10k 20k 30k 40k 50k 60 k 80 k 100 k Tabell 6: Inductive reactances for L-1mH 2.1 Questions 1. What is the relationship between inductive reactance and frequency? 2. What is the relationship between inductive reactance and inductance? 3. If the 10 mH trial had been repeated with frequencies 10 times higher than those in Table 5, what effect would that have on the experiment? 4. Do the coil resistances have any effect on the plots? 8