A 15 mH inductor is connected to an AC generator with a frequency of 60 Hz and carries a current i (t) = Imax sin(wt). If the maximum current is 8.3 A, what is the induced emf when 4.8 ms have elapsed?
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- A loop of wire has a self-inductance of 5.5 mH. You pass a current of 9.0 Amps though the loop, and then drop the current to 0 at a contastant rate over 3.5 seconds. What is the EMF generated?Use the worked example above to help you solve this problem. An AC generator consists of eight turns of wire, each having area A = 0.0890 m², with a total resistance of 10.3. The loop rotates in a magnetic field of 0.445 T at a constant frequency of 63.5 Hz. (a) Find the maximum induced emf. V (b) What is the maximum induced current? A (c) Determine the induced emf and current as functions of time. E = ( V)sin(wt) I = ( A) sin(wt) W = (d) What maximum torque must be applied to keep the coil turning? N.m (What is the inductance of a coil in which the average emf induced is 21V when the current in the coils increases from 3A to 10A in 2 s?
- You are to design an AC generator that has 800 circular windings, each with a radius of 1.75m. The generator is to produce a peak voltage of 12000V that oscillates with a frequency of 60Hz. What magnetic field should be used to accomplish this?In the figure, an ac generator with emf E = Em sin wat, where Em = 26.0 V and wd = 383 rad/s, is connected to a 12.3 H inductor. (a) What is the maximum value of the current? (b) When the current is a maximum, what is the emf of the generator? (c) When the emf of the generator is - 12.8 V and increasing in magnitude, what is the current? (a) Number i (b) Number i (c) Number i ellele iL VL Units A Units V Units ASuppose you have a supply of inductors ranging from 1.00 nH to 10.0 H, and resistors ranging from 0.100 Ω to 1.00 MΩ. What is the range of characteristic RL time constants you can produce by connecting a single resistor to a single inductor?
- A 17.0 μF capacitor is charged by a 130.0 V power supply, then disconnected from the power and connected in series with a 0.280 mH inductor. Calculate the energy stored in the inductor at t = 1.30 ms .The current in a coil decreases from 9.0 A to 5.5 A in 0.30 s. If the average emf induced in the coil is 25 mV, what is the self-inductance of the coil?What is the inductance of a coil in which the average emf induced is 20.0 mV when the current in the coil is increased from 3.50 A to 7.70 A in 0.330 s?
- Remove the inductor from the circuit in the figure and set R = 216 Q, C = 18.6 µF, fd = 60.0 Hz, and &m = 36.0 V. What are (a) Z, (b) , and (c) I? 90 R L 000 (a) Number Units (b) Number Units (c) Number UnitsA 10.0-mH inductor carries a current /=/max sin wt, with Imax = 5.00 A and f = w/2π = 60.0 Hz. What is the self-induced emf as a function of time?