0
Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
Can a dc electric field produce magnetic field?
Yes. A steady current will produce a magnetic field, B= uI/r
The 4017 IC is a decade (divide by ten) counter with decoded outputs. Internally, there is a 4 bit counter, with feedback to reset at 10 instead of 16, followed with a ten output decoder that makes each state available on a separate pin of the IC.
Another answer
One of my favorite IC's, the 4017 decade counter/divider.
The 4017 takes a clock pulse in and then steps the output from negative to positive in a series of ten steps, with only one pin being on at a time. It has the unique capability of counting up to a certain number and then restarting the count, counting up to a certain number and halting, or it can be cascaded to more 4017's for a higher count.
The outputs are labeled 0 through 9. It can sink about 10 ma. of current per pin and is a very versitile IC. It operates from 3 VDC. to 15 VDC.
Do a Google search and in parenthesis type in "LM4017". You'll be rewarded with all kinds of technical info which you can download and print.
What is activation polarization?
activation polarization is a polarization due to charge transfer kinetics of the electrochemical process involved.
its a n channel jfet(field effect transistor) manufactured by Motorola
Ripple factor (γ) may be defined as the ratio of the root mean square (rms) value
of the ripple voltage to the absolute value of the dc component of the output ...
What is the functions of ceramic capacitor?
Ceramic capacitors can be used anywhere a capacitor having very low internal parasitic inductance is required. Most commonly they are used as powersupply bypass capacitors. They are also sometimes used for coupling capacitors for HF signal amplifiers.
What is the difference between digital and analog signals in tabular form?
If we discuss the different between these two forms of the signals that is; analog and digital then we should discuss it in different aspects such as working, their architectures, pros and cons as well. The major differences among the two signals are listed below
What is the cost of a piezoelectric crystal?
The vast majority of devices that use piezoelectric crystals (piezoelectric buzzers, fish finders, atomic force microscopes, etc.) use crystals of lead zirconate titanate (PZT).
The crystal oscillator in a computer or digital clock uses the piezoelectric effect, but it is usually made of pure quartz (silicon dioxide).
Many different crystals and other materials exhibit the piezoelectric effect, including quartz crystals, cane sugar, and bone.
Does a toaster have a series or parallel circuit?
Normally I would expect the elements to be wired in parallel so that the loss of one element does not cause the others not to work. It is possible for some manufacturers to wire a pair of elements in series so that they could use say 110v elements as standard so that they can be utilized on 230v toasters as well.
Circuit for 12 v dc from 220 v ac without transformer?
First you should rectify the input ac voltage, but instead of using diode bridge, use a thyristor bridge(in diode bridge change the diodes to thyristor).
Connect the gates of the thristors together, cause they all must have the same fire angle.
On a paper calculate the dc level of the full wave signal(dc level of a full wave rectifier with thyristor is ready on your notebook or can find it on the internet by a simple search) to find the fire angle of the thyristors.
Now you can change the fire angle of the thyristors by changing the currents of the gates to get your desired dc level.
now you have a signal with your desired dc level, then smooth the output by a capacitor.
The reason that current leads voltage in a capacitor is rooted in the way a capacitor works. Picture the capacitor. It's basically two conductive plates separated by a short distance and having a dielectric (insulator) between them. Now, let's specify that our cap (capacitor) is completely discharged and we'll hook it up to a DC voltage source through a switch. Flip the switch on and current will begin to flow, but it is important to look at what happens in just the first instant of time. Electrons will begin to accumulate on the negative plate and their presence there will drive electrons off the positive plate. The capacitor is building up a charge. It is developing a voltage across (or between, if you prefer) the plates. But electrons have to begin to pile onto the plate to actually create the difference of potential (voltage) between the plates. The moving electrons (and that's current) that are piling on the plate are already beginning to flow before the voltage is developed between the plates, so current is said to lead voltage in a capacitor.
In a capacitor, the current flowing in it depends on the voltage difference across it. On AC, this makes it charge if the voltage is increasing above zero, and discharge if the voltage is reducing towards zero.
Because a capacitor has almost no internal resistance, and most loads that it is connected to have only very small resistances in series with the capacitor, the charging and discharging currents depend pretty much on the rate at which the voltage is changing. At the zero crossing point of the sine-wave, when the voltage is actually zero, the rate of change of voltage is very high (the sine-wave is at its steepest), so the current is also very high. If the voltage is positive-going, the current is positive, and if the voltage is negative-going, the current is negative.
At the peak of the voltage waveform, the rate of change of voltage is zero or very low (the sine-wave is just about flat, and not really changing its voltage) so the current is zero, too.
Since the maximum positive current occurs when the voltage is passing through zero, going positive, and the maximum negative current happens when the voltage is passing through zero, going negative, the current peaks happen 90 degrees before the voltage peaks, so the current is said to lead the voltage. This is the same as saying the voltage lags the current by 90 degrees.
What is normal telephone wire called?
I have always known it as 3 pair as it has 3 pairs of 3 colours. (blue, green and orange)
What is the total reactance of a series r-l-c circuit at resonance?
At resonance, the impedance of L and C completely cancel each other out, so you only have R left. If your circuit does not have any gain, then you should be able to determine the RMS current very easily by looking at the RMS voltage input divided by R.
What is the average cost of circuit board prototypes?
The average cost of these circuit board prototypes are they are a lots more than me and you got all together and it takes a special person that can afford these type of circuit board prototypes.
---- The output of JK flip flop :
J K Q(t+1)
---- 0 0 Q(t)
0 1 0
1 0 1
1 1 Q'(t)
----
the excitation table becomes:
Q(t) Q(t+1) J K
----
0 0 0 X
0 1 1 X
1 0 X 1
1 1 X 0 where X represents "don't care"
----
The out put of D flip Flop is:
Q(t+1) D
---- 0 0
1 1
---- Using MAP method, we find the function F
0 1
---- 0 X
1 1 X
----
F= J+K'
Therefore the JK flip flop becomes a D flip flop with an inverter paced just before the K entrance.
I would have shown you more if this site allow graphics!
What will happen if slip rings are removed from a DC motor?
It won't work. The slip rings work in conjunction with the brushes to connect a rotating part of the unit with the stationary part. We need to couple current into and out of the rotor, and without the slip rings for the brushes to ride on, we can't do that, and the motor won't work.
Usually, but some voltmeters are limited in the range of resistances they can measure.
AnswerNo, voltmeters measure voltage, notresistance.
What is the effect of bypass capacitor on frequency response?
Gain in a CE configuration of a BJT is collector resistance divided by emitter resistance, subject to the limit of hFe. The emitter bypass capacitor will have lower impedance at high frequency, so the gain will be higher at higher frequency, making this a high-pass amplifier.
What is bad about a series circuit?
In something like a lighting circuit, there are a couple of disadvantages to a series circuit. The first and most important is that all of the devices in the circuit must work. If you've ever dealt with Christmas tree lights you've seen the ones where one burned-out bulb kills the whole string. Second, the more bulbs in the circuit, the dimmer each one gets. But I think the worst one would be: you can't turn off any of the lights. If you turned one off, they'd all go out UNLESS you used a double-throw switch and a whole lot more wire so you could bypass any bulb you wanted to turn off. And when you did it, the lights that were still on would get brighter.
One of the disadvantage of a series circuit is in trouble shooting, you have to check ALL the loads of the circuit. Christmas light is the best example.
No advantage it is just a different What_are_the_disadvantages_in_using_a_series_circuitabove sample is lame because it will take as much time to find to open circuit in a parallel circuit.
In a series circuit, all components receive current in a row, and if the circuit through one is broken then none of the others can receive it.
In a series circuit any discontinuity of current flow will interrupt the rest of the circuit to operate.
*the more components the circuit has, the greater its resistance is.
*if just one component doesn't work, it opens the whole circuit.
i lay on the groudn and pretend im a carrot sometimes.
What can an egg be dropped into so it will not break?
try foam or something soft
or bubble rupp my name is Emily
What is the maximum length of a 1394a cable?
IEEE1394a runs at 400 to 3200 Megabits/second. aka Apple firewire.
