Figure P31.44
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Q: voltage drop across each resistor.
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Q: Consider a 27.5 mH inductor that has a resistance of 4.25 Ω. a) What is the time constant, τ, of…
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Q: The I vs t graph shown below is for an LR circuit without a battery. I (A) 12 16 14 10.5 7. 3.5 8 20…
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Q: has to be converted into a proper voltage form, using a Center Tapped Full wave Rectifier to get an…
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Q: Find the current through R₁ in the following image if R₁ is 2 ohms: R₁ 9V R₁ = 60 R₁ = 30
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Q: An iron core transformer is as shown in the figure. The primary coil has Np = 2000 turns and the…
A: The number of turns in the primary Np=2000 turns The number of turns in the secondary Ns=5000 turns…
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A: Given V1= 330 kV V2= 775 kV P1 = 1000MW R = 2.30 ohms
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Q: The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket…
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Q: The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket…
A: Vs = 9 V Is = 252 mA = 0.252 A Vp = 120 V
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A: Given, Vinput=220 VVoutput=110Vnprimary=100
Q: A 27.0 mH inductor, an 6.00 Ω resistor, and a 6.00 V battery are connected in series. The switch is…
A: Given: Inductance of inductor = 27.0 mH Resistance R=6.0 Ω voltage of battery ε=6.0 V
Consider the ac adapter that bisects the power cord to your laptop computer, cell phone charger, or another electronic device. (a) What dc output voltage V and current I are listed on your device? (b) What power P is listed on your device? Does P = IV? (c) Your ac adapter is most likely not a simple transformer; however, it is instructive to analyze the device as if it were: Assume your device is a transformer with a 120 V rms voltage on its primary coil and a full-wave rectifier following its secondary coil. If an R-C circuit with a sufficient time constant followed, the ultimate output would maintain the dc value of the voltage amplitude on the rectified secondary coil. If the primary coil has 200 turns, how many turns are needed on the secondary coil to produce the stated dc output according to this scheme? (Give the closest integer value.) (d) Estimate the current amplitude in the primary coil. (e) Based on the size of your device and assuming the transformer geometry shown in Fig. estimate the length l of the primary coil. (f) Use Ampere’s law to estimate the average strength of the magnetic field inside the core, assuming a relative permeability of 5000.
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- Among the four different settings for values of \( R \) and \( C \) in the circuit shown below, which setting would result in the initially charged capacitor discharging more rapidly after the switch is closed?: R = 3 Ω, C = 10 µF R = 5 Ω, C = 3 µF R = 3 Ω, C = 5 µF R = 2 Ω, C = 5 µFThree resistors, R, 2R, and 3R, where R = 18.8 2, are wired to an inductor, L = 0.255 H, an emf, ε = 44.7 V, and a switch as shown in the circuit diagram. Assume the direction of the three currents, 11, 12, and 13, are as indicated in the diagram. 1₂ 2R 13 ooo ہوThe closed circuit shown below (same as #1) has a resistor of 5 Ω, an inductor of 6 mH, and a battery with 12 V. What is the current 2s after the switch 1 is closed? 0 A 1.95 A 2.4 A 4.12 A
- How does the addition of capacitors or inductors affect the behavior of alternating current (AC) circuits?A 12.0-V battery is connected into a series circuit containing a 20.0-2 resistor and a 1.70-H inductor. (a) In what time interval will the current reach 50.0% of its final value? S (b) In what time interval will the current reach 90.0% of its final value? SIf you triple the inductance of an inductor, by what factor will the amount of energy it can store increase?
- An inductor, battery, resistance, and ammeter and switch are connected in series. If the switch, initially open, is now closed, what is the current's final value? O zero battery voltage divided by inductance battery voltage times inductance battery voltage divided by resistanceA transformer is to be used to provide power for a computer disk drive that needs 5.6 V (rms) instead of the 120 V (rms) from the wall outlet. The number of turns in the primary is 420, and it delivers 500 mA (the secondary current) at an output voltage of 5.6 V (rms). (a) Should the transformer have more turns in the secondary compared to the primary, or fewer turns? O There should be more turns in the secondary. O There should be fewer turns in the secondary. (b) Find the current in the primary. (c) Find the number of turns in the secondary. turnsThe circuit was in DC steady state for t < 0. A quantity absolutely cannot change suddenly in this circuit, and in general unless nothing else can happen. It must be continuous across the switch opening. Which is that quantity? (The battery voltage also remains constant; that's not the answer I'm looking for.) Please see photos for more details
- A V = 86-V source is connected in series with an R = 1.8-kΩ resistor and an L = 26-H inductor and the current is allowed to reach maximum. At time t = 0 a switch is thrown that disconnects the voltage source but leaves the resistor and the inductor connected in their own circuit. 1) How much time, in milliseconds, is needed for the current in the circuit to drop to 12 % of its value at t = 0? 2) How much energy, in millijoules, does the circuit dissipate during that time?In a home stereo system, low sound frequencies are handled by large “woofer” speakers, and high frequencies by smaller “tweeter” speakers. For the best sound reproduction, low-frequency currents from the amplifier should not reach the tweeter. One way to do this is to place a capacitor in series with the 8.0 Ω resistance of the tweeter; one then has an RLC circuit with no inductor L (that is, an RLC circuit with L = 0). What value of C should be chosen so that the current through the tweeter at 200 Hz is half its value at very high frequencies?You decide to “go green" and use an exercise bike to power your home appliances. Assume that your exercise bike is rigged to generate electrical power with 60% efficiency. In other words, only 6/10 of the power you develop can be used to store electrical energy for later use. Consider your 3500-Watt central AC unit. You need to run this unit for 4 hours each day during the summer. If you can develop a sustained power of 300 Watts on your exercise bike, how long would you have to work out just to keep the AC running on a summer day?