1.Assume that the switch has been closed for a long period of time. What is the currentthrough the inductor A. immediately before the switch is opened, B. immediately after the switch isopened, C. a long time after the switch is opened?80 V+2 ΚΩw0i₂4 k12 ΚΩw640 mH

a.)Step 1: Let R1=2kΩ; R2=12kΩ; and R3=4kΩ Step 2: To find the total resistance for the series…

Answered: 1. Assume that the switch has been…

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 5SQ: The symbol shown is a a. polarized capacitor. b. normally closed switch. c. normally open held...

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If the charging resistor was twice as large as the discharging resistor in Figure 4, theamplitudes of the charging and discharging waveforms would be ________.a. The sameb. Different
For the circuit in the figurea) Determine the time constant.b) Write the mathematical expression for IL, VL and VR, after the switch is closed.c) Determine IL, VL for one, three and five time constants.d) Draw the waveforms of IL, VL and VR.
1. A purely resistive circuit the current is leading by 90° with respect to voltage. 2. A purely inductive circuit the current is lag behind the voltage by 90°. 3. A purely capacitive circuit the current is lead by 90° with respect to the voltage. 4. A capacitor element stored magnetic energy. 5. An inductor element stored electrical energy. 6. Resistor elements consume power. 7. Angle between current and voltage is called power. 8. The power factor angle for a purely resistive is zero. 9. The power factor angle for a purely inductive load is -90°. 10. The power factor of a purely capacitive is leading.
If the resistors used for charging and discharging were the same, the charging anddischarging waveform would be ________.a. Symmetricalb. Nonsymmetrical
Why is it desirable to wait 1 s after a potential pulse before recording the current in voltammetry?
1. Which of the following answers best describes discontinuous conduction mode? A. The inductor voltage ripple goes negative B. The inductor current ripple stays positive C. The inductor current ripple falls to zero D. The output current ripple falls to zero
EXAMPLE + 5V – 0.1uF At the instant the switch makes a contact with terminal a, the voltage across the capacitor is 5V. The 10V b 6V 100k2 switch remains at a for 9 ms then moves to terminal b. How many milliseconds after making contact with terminal a does the opamp 8V -6V saturate?
An LM317 is connected between two decoupling capacitors. There is a 220ohm resistor between the output pin and the adjust pin. Note the voltage drop between the output and adjust pins is 1.25V. Find the resistor needed between the Adjust pin and ground to ensure 5 V is dropped across the load. Enter your answer in ohms: _ohms
The circuit in the figure below contains two resistors, R1 = 4.00kΩ and R2 = 5.00kΩ, and two capacitors, C1 = 4.00uF and C2 = 5.00uF, connected to a battery with emf E = 120V. If no charges exist on the capacitors before switch S is closed, determine the charge q1 on capacitor C1 1.00ms after the switch is closed. Determine the charge q2 on capacitor C2 1.00ms after the switch is closed.
The figure displays two circuits with a charged capacitor that is to be discharged through a resistor when a switch is closed. In figure (a) below, R₁ = 23.32 and C₁ = 5.04 μF. In figure (b) below, R2 = 10.82 and C₂ = 8.10 μF. The ratio of the initial charges on the two capacitors is 902/901 = 1.61. At time t = 0, both switches are closed. At what time t do the two capacitors have the same charge? 0.0 (a) (b) Number i Units
In the circuit below, switch S is initially disconnected from points A and B. The switch is then connected to A. What is the current and voltage in the resistors and inductor: a) as soon as the switch is turned on b) long after the key is turned on. The switch is then suddenly disconnected from A and connected to B: c) What is the current in the resistors at that moment? d) What is the voltage in the inductor? e) After that moment, what is the total energy dissipated by the resistors?
STEP 4: make sure the capacitor is fully charged using the PSB set to 3.3V. Then switch the OAB jumper to 5V and hold SW1 closed again until the LED goes out

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1. Assume that the switch has been closed for a long period of time. What is the current through the inductor A. immediately before the switch is opened, B. immediately after the switch is opened, C. a long time after the switch is opened? 80 V + 2 ΚΩ w 0 i₂4 k 12 ΚΩ w 640 mH