Ferrite Chip Inductors

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Product Description:

1.ferrite chip inductors

2.leaching resistant rerminations due to metal teb electrodes

3.Coils encapsulated in heat-proof



1.Ferrite chip inductors

2.leaching resistant rerminations due to metal teb electrodes.

3.Coils encapsulated in heat-proof resin make high accurate

4.dimesions and resostant dimensionsand resostant to mechanical shock or pressure.

5.High resistance to heat and humidity.



Personal computers. Disk drives and comuter peripherals. Telecommunications devices. VCD, DVD and TV circuits,

Test equipment. Electronic control control boards for automobiles.

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Q:A 15 µF capacitor is charged to 15 V and is then connected across a 20 mH inductor?
a) Eng.5 C V^21.688E-3 J b) f1/sqrt(2 pi L C)728 Hz c) the peak energy in the inductor will be 1.688E-3. Isqrt(2 Eng/L)-.411 amps.
Q:When you have an inductor in parallel in a circuit, does it act as a short circuit?
Almost. If it is made of very low ohmic value.
Q:What is starting AC current on an inductor?
pbolton seems to think you mean a motor starting current. If you've expressed yourself clearly (which I believe to be case) then you mean the starting current on a pure inductance. As you say you might apply the voltage as sin. (staring from zero) then the steady state current would be -cos. However at the start we are faced with the problem that a current in an inductance cannot change suddenly. What happens is that a dc current component of +1 appears instantaneously in the coil to cancel the -cos, giving a net starting current of zero. The steady state -cos wave then proceeds superimposed on the +1 dc. The latter (starting transient) then slowly decays at the time constant of the coil (L/R) since it has no voltage to sustain it, leaving the -cos as steady state value. If the inductor and supply voltage had no resistance the d.c component would persist indefinitely. If you start the voltage at different points in the cycle the size of the transient dc component will vary but is always somewhere in the range -1 to +1.
Q:How many turns for an inductor?
Inductance is a function of cross sectional area so if you reduce the cross section you have to increase the number of turns. The approximate formula for an air inductor is L(uH) d^2*n^2/(9N+10L) where d is the diameter, n is the number of turns and L is the length of the winding. So if you decrease the the diameter you'll have to add a corresponding number of turns. A narrower coil will reduce the Q (goodness factor) of the coil as well. If you want to use an Altoid container I'd recommend you use a plastic one and wind the coil around the outside and varnish it, alternatively wind the coil around a roll of card or paper on a ferrite rod. About 88 turns on a ferrite rod (or a toilet roll inner approx 1.5 if you don't use the Altoid container) is good for the AM band, probably need an extra 10+ turns or so if you wind over a bic pen. Try winding 110 turns and tap every ten turns from the 80th turn. Use 24-28 (awg/swg) gauge wire. You can use up to 34 gauge but it's more fragile and the Q of a winding is lower. Other tips, use a decent germanium diode (OA81, IN34 etc.) for your detector and an earphone from an old telephone handset. Crystal sets are completely reliant on a good antenna and a good ground. The ground from a power outlet will work although a ground spike in the earth outside the house is better. The antenna should be the longest wire you can manage, at least 20ft, preferably double that. Before you start coil winding or construction there are a number of crystal radio (sometimes called foxhole radios) kits on Amazon and the like which are quite reasonably priced. It's not by accident they all use large inductors as they give better performance.
Q:A resistor and inductor connected to an AC power source?
a) Resistor peak voltage is VRp Ip * R 0.1A * 35 ohm 3.5 V b) Inductor reactance at f 30Hz is XL 2pi*30Hz*0.25H 47.1 ohm Inductor peak voltage is VLp Ip * XL 0.1A * 47.1 ohm 4.71 V c) Total series circuit impedance is Z sqrt(R^2 + XL^2) 58.7 ohm Source peak voltage is Vp Ip * Z 0.1A * 58.7 ohm 5.87 V
Q:Is capacitor/inductor substitution real?
I believe that the substitution is real, but not literal - for example in op amp filters a feedback inductor is the same as a feed in capacitor, and so on. Perhaps at a certain frequency a capacitor will look the same as an inductor in a circuit, but it seems impossible to for a capacitor to replace an inductor across all frequencies. Then again, I'm still an undergrad, and perhaps in something like a dc oscillator, it could be done.
Q:A question regarding inductor?
Q:A capacitor in series with an inductor:?
It will oscillate and form a series filter.
Q:Physics inductors and resistance!!?
hyperphysics.phy-astr.gsu.edu/hba model the inductor as a perfect inductor and a perfect resistor in series.
Q:Physics : charge a coil inductor(which quantity will not be doubled)?
Answer is b This question assumes a specific type of inductor. The most simple inductor is the air core coil. In that type the length l of the coil is in the denominator of the expression for L. Thus if the length is half, L is doubled. Therefore a is NOT correct. R/L is half and VL(t) Vm*e^-Rt/L so the charge time IS NOT Doubled. It is longer but not doubled. Energy in the inductor EL 1/2 *L*I^2 is doubled when L is doubled so c is NOT correct The magnetic field in a coil IS proportional to the number of turns of wire per unit LENGTH. Thus the magnetic field in the coil IS DOUBLED too. So d is NOT correct. The answer must be b
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