Low Frequency High Quality Coil/Inductor

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Specifications

1.Radial Fixed Leaded Inductors with Inductance ranging from 0.30uH to 100mH.

2.ROHS compliance.

3.Good quality and low price

4.low loose

Our products have gained the international certifications, such as CQC, CE, RoHS, UL and so on, from internationally powerful authorities. We have got ISO9001 certificate. We promise to offer the best products to our clients. We look forward to cooperating with all friends for more mutual benefits.

Q: A certain circuit consists of an inductor of 5 mH in series with a resistor of 200. At a moment when the current in the circuit is 19 A, a switch in the circuit is opened. How long will it take for the current to fall to 6.46 A? Answer in units of s.: First find the time constant: T L/R.005/200 take this answer and plug it in this equation; Second find time t: t T LN(Io/If) T LN(19/6.46). Don't answer in scientific notation.

Q: a pure inductor in an a.c. circuit, the rate of change of current with time can be obtained by using calculus and differentiating the current equation.can you explain me how get this equation step by step: For a linear inductor with no resistance EL di/dt, by definition and fundamental physics. From this, integral(di)i(1/L)integral(E dt)

Q: 6. An inductor opposes an instantaneous change in its own voltage? 7. Xc is the AC opposition to current flow? 8. Xc grows smaller as the frequency is increased in a circuit 9. Inductor and capacitor currents are 360 degrees out of phase? 10. XL is the AC opposition to current flow? 11. The term impedance, applied to a circuit with capacitors and resistance is the phasor sum or result of the resistance and capacitive reactance.12. impedance z is defined as the total opposition to voltage in an AC circuit.13. The current always leads the voltage in a series resistor capacitor circuit by 45 degrees.15. When a sinusoid voltage is applied to an RC circuit, the current and all the voltage drops are also sine waves.16. Total current in an RC circuit always leads the source voltage.: An inductor opposes an instantaneous change in its own voltage? FALSE 7. Xc is the AC opposition to current flow? not entirely TRUE - Xc is one form of opposition to alternating current flow, but the total opposition to ac current is the impedance which is given the symbol Z. 8. Xc grows smaller as the frequency is increased in a circuit TRUE : Xc 1 / ( 2 π f C ) 9. Inductor and capacitor currents are 360 degrees out of phase? FALSE in a series circuit they are in phase with one another, in a parallel circuit the two currents are (approximately) in antiphase i.e. 180° out of phase 10. XL is the AC opposition to current flow? not entirely TRUE - XL is one form of opposition to alternating current flow, but the total opposition to ac current is the impedance which is given the symbol Z. 11. The term impedance, applied to a circuit with capacitors and resistance is the phasor sum or result of the resistance and capacitive reactance. More or less TRUE. In a series CR circuit the impedance is the phasor sum of capacitive reactance and resistance, but that is not true for a parallel connection. 12. impedance z is defined as the total opposition to voltage in an AC circuit. FALSE. Z is may be described as the total opposition to CURRENT flow, but that description is not really rigorous enough to constitute a formal definition. 13. The current always leads the voltage in a series resistor capacitor circuit by 45 degrees. FALSE It is only true if the resistance is EQUAL TO the capacitive reactance. 15. When a sinusoid voltage is applied to an RC circuit, the current and all the voltage drops are also sine waves. TRUE (provided that the sinusoidal voltage is the only applied voltage and adequate time has elapsed for any transients to decay to a negligible level) 16. Total current in an RC circuit always leads the source voltage. Only true if the source voltage is alternating. Not true if the applied voltage is a constant dc level.

Q: I have a 9 Volt DC source in series with an inductor, and a switch. Once i close the switch, there is a spike on the screen of my oscilloscope but it is not precisely when I close the switch, a very breif moment later. The spike rapidly comes down to a steady line across the screen - indicating the dc source. Once I open the switch I get the reverse situation, the spike is in the negative and increases to the steady state.I am not truly understanding what is going on here. I connected my leads across the coil, negative to the side of the coil connected from the negative battery terminal, the positive to the other end. I am seeing the voltage drop across the coil, as the current increases is this voltage drop increasing to a maximum point then it suddenly returns to a minimum value where the voltage is source? I am soo confused .Help !!: When you turn the current off, you are forcing the current to be zero in a short time. Since: V L x (rate-of-change of current), the voltage will go negative for the short time that the current changes from it's steady value to zero. When you turn the circuit on, you should initially see the full (open circuit) voltage of the battery. I imagine this is the spike you see. After a short time, the current reaches the battery's limit, and the voltage will drop. If the battery is fresh, you should see the spike at about 9V, and then it will drop to a steady value that is less than 9V. Current is being limited by the battery's internal resistance. Hope this helps.

Q: i'm an older brother who just wants to build his little brother a fairly decent sound system for his car (he just got his licence and dad bought him a second hand car). odd thing is, my bro likes it more if i build him stuff rather than buy them for him. now, i've seen all the formulas, guides, calculations, ohms, farads and self help guides but I cant make heads or tails about it considering i'm an architecture student and numbers and crud like that confuse me to no end. i'm pretty good when it comes to building the enclosures but i'm crap at the electronics stuff. i've already got a set of subs that dad bought (200 watts each) and another set that a cousin gave me (50 watts each) and they're all 10 inches wide. can anyone help me? what kind of inductors and capacitors do need to for both the 200 watts set and the 50?: Hifonicgts Goliath XX-3212 3200 RMS great woofer dude, audio AQ3500D.a million Amplifier is what i might cautioned to you, a pal have those amplifier on 2 of the 18 inch DC audio XL sequence 1500 watts RMS slightly dude is loud as hell at one ohm load. beat like loopy, yet I nevertheless think of that hifoncis goliath is sicker for amplifiers.

Q: Here is the diagram: Just to supplement the first guys answer. at tinfinity, the circuit has reached steady state. In a steady state DC circuit, the inductors magnetic field is no longer changing so there is no induced emf. Therefore the inductor basically behaves as a short circuit so all the voltage Vb is across the resistor.

Q: I have been searching for inductors for a 2nd order crossover and can't find exact matches, only close matches. How much will my crossover be affected if I use a 3.3 mH inductor instead of a 3.2 mH inductor? What about using a 5.0 mH inductor instead of a 5.2 mH inductor for the second one? Will it be that noticeably and undesirably affected?: The tolerance on the inductors is likely to be ±5%; the tolerance on the capacitors is more likely to be ±10%. 3.3mH is out by +0.3% from 3.2mH and 5.0mH is out by -4% from 5.2mH. It'll probably sound fine. You could even add a few extra turns (1 more for every 50: the inductance is proportional to the number of turns squared, so increasing turns by 2% will increase inductance by double that, i.e. 4%) on the 5mH inductor, or stick a piece of ferrite rod down the middle if it doesn't.

Q: A parallel RLC circuit consists of a 3.7 mH inductor, a 4.7 ?F capacitor, and a 1.4 ? resistor driven at 150 Hz:1.) Calculate the reactance of each component at the driving frequency (f 150 Hz, but youprobably want ω).2.) Calculate the impedance Z for this circuit. Remember that you need to use the AC versionof Ohm’s law appropriately, since the current is common.: L 3.7 mH C 4.7 μF R 1.4 Ω f 150 Hz Reactance of i) Capacitor X_c 1/(2πfC) 1/(2*3.14*150*4.7*10^-6) 225.87 Ω ii) Inductor X_? 2πfL 2*3.14*3.7*150*10^-3 3.4854 Ω iii) Resitor X_r R 1.4 Ω ___________________________ Impedance of circuit Z sqrt((X_? - X_c)^2 - R^2) Z sqrt((3.4854 - 225.87)^2 - 1.4^2) 222.38 Ω

Q: A 9.5 H inductor carries a current of 1.8 A. At what rate must the current be changed to produce a 60 V emf in the inductor?: properly it exchange into meant to be a parody of the grey Mans face it is submit whilst human beings have not created their avatar. i had to do a sort of three-D matalic form mask of the old 'smiley' face they used to have yet they replaced it in the previous I had the possibility. I had to extend this one from a print out from a working laptop or computing device cafe in spite of the fact that it wasn't too sparkling. I comprehend now I could have taken the enlarged define around to a eating place returned and then re-worked the drawing from an avatar on the seen exhibit unit.

Q: a measured value of 100 ohm and the another has a measured value of 10 Ohm.Which inductor would you choose to use in a circuit where the narrowest possible bandwidth is required and why? A. Use 100 Ohm inductor because it has a higher Q. B. Use the 100 Ohm inductor because it has a lower Q. C . Use 10 Ohm inductor because it has a higher Q D.Use the 10 Ohm inductor because it has a lower Q.: C . Use 10 Ohm inductor because it has a higher Q Q wL/R where w is the frequency in radians per second, L the inductance and R the resistance of the inductor.

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1. Manufacturer Overview

Location	Shenzhen, Guangdong, China (Mainland)
Year Established	2006
Annual Output Value	US$2.5 Million - US$5 Million
Main Markets	North America; South America; Eastern Europe; Southeast Asia; Africa; Oceania; Mid East; Eastern Asia; Western Europe; Central America; Northern Europe; Southern Europe; South Asia; Domestic Market
Company Certifications	CE Certificates

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3. Manufacturer Capability

a) Trade Capacity
Nearest Port	Shekou,Yantian
Export Percentage	51% - 60%
No.of Employees in Trade Department	3-5 People
Language Spoken:	English, Chinese
b) Factory Information
Factory Size:	3,000-5,000 square meters
No. of Production Lines	9
Contract Manufacturing	OEM Service Offered Design Service Offered Buyer Label Offered
Product Price Range	Average