Question

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OBJECTIVES Study the behavior of capacitors while charging Learn how changing the values of R or C in a series RC circuit affects the charging time Learn the behavior of capacitor and inductor in a DC circuit 1. 2. 3. EQUIPMENT Breadboard, Multimeter, DC power supply, Oscilloscope, Resistor, Capacitor (values will be provided in lab) Connect the given circuit and notice how the capacitor charges Measure the voltage across the resistor, and across the capacitor before S1 is closed, and after it is closed. S2 is open Write your measurements in table a) a. $1 b. The second switch is used to discharge the capacitor if its charged. Measure the voltage across R and C when S1 is open and S2 is closed. Write your measurements in table b) Record the time needed to fully charge. Write your measurements in table c) R1 c. Figure 1 d. Measure the acutal resistance value and calculate the theoretical value of time Comment the results from a andb e. VR befores1 C_before VR afters1 C after c) & d) Connect the given circuit shown and after certain time measure the voltage across the capacitor and the 2. voltage across R4. What do you notice? R1 R3 R4 10kn 5V 1kO *Questions starting with star (*) are assigned for lab report. Do it at home **Use multisim to visualize the transient response of RC and RL circuits as shown in figure 1 3. Make the circuit in multisim a. b. Make sure that the capacitor is discharge by switching on S2, then switch off S2 and switch on S1 Measure the voltage across the capacitor. Write your measurements in table b). How the circuit behaves? Comment. Change the values of R (choose 2 other values) and the values of C (choose 2 other values). Write your measurements in table c). Comment on the behavior of the circuit and your findings c. d. Repeat procedure a-c in figure 1 with an inductor of 1 mH, then change the values as in procedure Write your measurements in table d). Comment the results from a to c, for RL circuit. b) d) ii) C1- L2- R1 R2 R1 C2 L1 L2 e) Import a printoff Multisim circuit for RC and RL containing voltmeter and show the measured value on it. f) Connect the function generator to power supply (Vin), and oscilloscope to voltage acrros capacitor and inductor. Show the voltage waveform. Import printoff from Multisim

Answer 1

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