COMPLETE TWO PART ASSIGNMENT….PART 1 AND LAB PART 2
PART 1:
RC and L/R Circuits
- Consider the series L/R circuit below:
- What is the time constant of the circuit with S1 closed?
- What is the eventual steady-state current with S1 closed?
- What is the value of the circuit current at the first instant S1 is closed? (t = 0s)
- What is the value of the circuit current exactly one time constant after S1 is closed?
- How long after S1 closes will it take before the circuit current reaches its steady-state value?
- For the same circuit, assume that the switch S1 has been closed for more than five L/R time constants. If a 1MΩ resistor is placed across the terminals of the switch, calculate:
- The approximate time constant of the circuit with S1 open.
- The peak inductor voltage VL, when S1 is opened.
- The di/dt value the instant S1 is opened.
- How long it takes for the current to decay to zero after S1 is opened (approximately).
Series L/R Circuit:
- Consider the series RC circuit below:
- Assume C1 is completely discharged with S1 in the position shown. If S1 is moved to the top position, how long will it take for the capacitor voltage to reach
- 3V
- 6V
- 15V
- 20V
- Assume that C is completely discharged with S1 in the position shown. If S1 is moved to the top position, how much is the resistor voltage at the following time intervals?
- t = 0 s
- t = 4.5 ms
- t = 10 ms
- t = 15 ms
- t = 25 ms
- Assume that C is fully charged with S1 in the top position. If S1 is moved to the bottom position (as shown), how long with it take the capacitor to discharge to:
- 4 V
- 8 V
- 12 V
- 18 V
Series RC Circuit:
LAB PART 2:
Series L/R and RC Circuits
- Watch the video
- Week 6 Video Lecture – Multisim Series RL
- Construct the series L/R and RC circuits from this week’s assignment in MultiSIM and perform Transient Analysis on each circuit to confirm your calculations. Use a 5% tolerance for all of the components. Capture a screenshot of the output of the analysis to confirm your calculations. Create a table to demonstrate your expected and measured values.
- Include a discussion of the following:
- Differences between the calculations and the simulations.
- How would you go about designing a circuit with an applied voltage of 24V and a resistor of 1kohms such that the current in the circuit starts out at 0A and reaches 24mA in 2 seconds?
- How would you go about designing a circuit with an applied voltage of 24V and a resistor of 1kohms such that voltage starts out at 0V and reaches 24V in 2 seconds?