P-7.23 The switch in the circuit below has been in position "a" for a long time. At t = 0, the switch is thrown from position "a" to position "b." If V, = 120 V, determine : a. The voltage across the capacitor, v, (t), for t 20 b. The current through the 40K resistor, i, (t), for t 20 V 5k 120 V 10k a t = 0 b + 160 μF 40k 25k 10k
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- You are an electrician working in an industrial plant. You discover that the problem with a certain machine is a defective capacitor. The capacitor is connected to a 240-volt AC circuit. The information on the capacitor reveals that it has a capacitance value of 10 mF and a voltage rating of 240 VAC. The only 10-mF AC capacitor in the storeroom is marked with a voltage rating of 350 WVDC. Can this capacitor be used to replace the defective capacitor? Explain your answer.I Review | Constants In the circuit shown in the following figure(Figure 1) the capacitor has capacitance 17 uF and is initially uncharged. The resistor Ro has resistance 11N. An emf of 91.0 V is added in series with the capacitor and the resistor. The emf is placed between the capacitor and the switch, with the positive terminal of the emf adjacent to the capacitor. The small circuit is not connected in any way to the large one. The wire of the small circuit has a resistance of 1.0 N/m and contains 30 loops. The large Part A The switch is closed at t = 0. When the current in the large circuit is 3.10 A , what is the magnitude of the induced current in the small circuit? Express your answer with the appropriate units. circuit is a rectangle 2.0 m by 4.0 m, while the small one has dimensions a = 13.0 cm and b = 23.0 cm. The distance c is 4.0 cm. (The figure is not drawn to scale.) Both circuits are held stationary. Assume that only the wire nearest the small circuit produces an…Consider the circuit shown below, with an initially uncharged capacitor C and two identical resistors R. R O www V I C I₂ R C R At the instant the switch is closed, the current through the capacitor will be: zero At the instant the switch is closed, the current through the right-side resistor will be: V/R, directed Up After the switch has been closed for a very long time, it is opened. The current through the right-side resistor will be V/R, directed Down The switch is closed at t = 0. At t = ~ (long after) the current through the right-side resistor will be: V/2R, directed Down ✓ The switch is closed at t = 0. At t = ~ (long after) the current through the capacitor will be: V/2R, directed Up After the switch has been closed for a very long time, it is ope ed. The current through the be? V/R, directed Down pacitor will
- TRUE or FALSE a. A discontinuous change in the voltage requires an infinite current thus a capacitor resists an abrupt change in the voltage across it. b. The inductor takes power from the circuit when storing energy and delivers power to the circuit when returning previously stored energy.In the following figure, the switch is left in position a for a long time interval and is then quickly thrown to position b. Find and rank the magnitudes of the voltages (V, VL, VRI, Vr2) across the four circuit elements a short time thereafter from the largest to the smallest. Vs 12.0 V 2.00 H 1 200 0 VRI 12.0 0 Vr2A capacitor that is initially uncharged is connected in series with a resistor and a 300.0 V emf source with negligible internal resistance. Just after the circuit is completed, the current through the resistor is 0.950 mA and the time constant for the circuit is 6.00 s. (A) What is the resistance of the resistor? (B) What is the capacitance of the capacitor?
- A 0.7-H inductor is connected in series with a 9-ohm resistor. If the connection is energized from an 11-V DC source, determine which among the following is a differential equation describing the current / in the circuit at any time t. O A. di dt O B. di 8 dt O C. di dt OD. di dt 90 + -i = 7 + + + 110 7 7 110 7 90 1 = i = i = 110 7 90 7 90 7 110The R-L Circuit: An inductor with an inductance of 2.50 H and a resistance of 7.00 n is connected to the terminals ofa battery with an emf of 6.00 V and an internal resistance of 1.00 n. What is the rate ofincrease of current at the instant when the current is 0.500 A? A) 0.8 A/s B) 0.6 A/s C) 0.4 A/s D) zero E) None of the above.switch is in position 2, circuit will discharge the inductor draw the circuit in discharge phase, the equations for v(t) and i(t) of the inductor for the discharge phase, and determine the time constant for the discharge phase
- Basic Electrical Engineering: Inductance and Capacitance You are an electrician working in an industrial plant. You discover the problem with a certain machine is a defective capacitor. The capacitor is connected to a 240-V AC circuit. The information on the capacitor reveals that it has a capacitance value of 10 µF and a voltage rating of 240 V AC. The only 10-µF capacitor in the storeroom is marked with a voltage rating 350 VDC. Can this capacitor be used to replace the defective capacitor? Explain your answer.A resistor and a capacitance are connected in series to an emf source. The time constant of the circuit is 0.87 s. What will be the 35 - time constant of the new circuit when another capacitor identical to the first is connected in series with the circuit? O a) 0.973s O B) 1,742 s O C) 2.034 s O D) 2.136 s O TO) 0.435 sFor the circuit in Figure 3 the switch is in the left position for several minutes: (a) Find the Initlal voltage, V, on the capacitor just before the switch is flipped (b) Find an expression v(t) that describes the voltage across the 20 N resistor after the switch has been Figure 3 U 09 flipped to the right NOTE: Remember what we said in class: use a Circuit-Specific Equation to get a value you know. Then solve for whatever else the problem asks for +50 µF 380 0 20 2