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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
Why is it not good to operate a transformer above its nominal voltage?
Operation above the rated supply voltage causes the ferromagnetic core to enter saturation; this means that the primary inductance is reduced and since the primary current is limited by primary resistance +inductance then the primary current will increase and possibly cause the primary winding current capacity to be exceeded. Also the iron core hysteresis loss will likely increase and cause the core temperature to rise. We have not considered eddy currents in the core, probably these are less than the hysteresis core loss.
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Addition:
also the stresses that caused by increasing the voltage will over heat the transformer by mean the life time is redused, for example: if the life time for a transformer is 20 years this number will decrease due to operating the transformer on a higher voltages than the rated...
Is a merimbula a amaican instrument?
A co-worker of mine just took a holiday to merimbula, NSW and i argued the same point that merimbula is also the name of a large wooden xylophone-like instrument. Its been driving me nuts, but good to know that at least one other person in the world shares the same belief/illusion!
Difference between 1's complement and 2's complement?
One's complement have a positive and a negative zero. Two's complement is the solution to such problem. Because of this, two's complement have more negative numbers than positives. (Just one more).
http://www.youtube.com/watch?v=9W67I2zzAfo&feature=related
Is the amount of space charge created at the cathode is primarily controlled by the tube current?
The cathode space charge is determined by the voltage on the filament.
How can you produce 5 volt in voltage regulator having IC LM 2941CT?
Put a voltage divider between Vout and Vadjust pins. See page 9 of the datasheet from National's site.
What do you do after you put your phone in rice?
you cook your rice, and eat it with anything you like. rice goes with everything. throw the phone away you dont need it you need the rice.
Because in the coil DC current follow easly and pmmc meter is making with coil and AC current is not follow in coil so we used the pmmc only fpr DC current.
Doesn't a transformer work with dc from a generator?
Transformers do not work with DC.
Transformers are magnetically coupled inductive devices that operate with AC (fluctuating) voltages. If you supplied DC to a transformer, it would simply look like a short circuit, and the secondary would stabilize to no voltage and no current.
This is because, in order to generate a current in a conductor from a magnetic field, either the magnetic field needs to be fluctuating or the conductor needs to be moving.
What is an explanation of nor gate?
1. Explain NOR gate as Universal Gate
A NOR gate is a simple OR gate with an inverter (NOT gate) at the output.
NOR gates are considered Universal Gates because thay can be configured in a few different ways.
Connecting the inputs on a NOR gate will result in a NOT gate (inverter).
Connecting the above to the output of a NOR gate results in an OR gate.
What is the relationship between resistance and capacitance in a clc circuit?
The relationship between resistance and capacitance in a clc circuit is the capacitive reactance given by XC.
How do you tell if you have delta or wye power?
In Europe, low-voltage three-phase distribution is by means of a four-wire system (three line conductors and a neutral) supplied from a wye-connected transformer secondary.
In North America, low-voltage is supplied from a delta-connected transformer secondary, one phase of which is centre-tapped and earthed (grounded). The single-phase supply to residences is then supplied by that particular phase, giving 240 V line-to-line and 120 V line-to-neutral.
You can tell if you have a delta power when the phase voltage is equal to the line voltage and that you have a star power when the phase voltage =root 3(THE LINE VOLTAGE).
How To Learn CAD drafting technique easily?
Are you willing to learn the special CAD drafting techniques? There are several options being available in the market that help you to learn this computer aided drafting without any difficulty. You can check out the options that have been enlisted below:
1. It would be best if you enroll yourself in the degree program of applied sciences in CADD. This will help you to learn every technique that is required to learn about computer aided drafting.
2. If you want to learn more your option will be to pursue a BA degree in computer aided drafting. Here you will be able to learn various facades of CAD like mechanical ad architectural drafting, 3D rendering and modeling. Otherwise you can also take up special AutoCAD certificate courses also.
3. You can also gather enough knowledge and keep yourself updated by studying several books on CAD. There are several websites that also help you to gather vital information and current news on this technology. All these help you to horn your skills.
4. You can also get hold of e book or special articles of experts that can throw much light on the nitty-gritty of this technology. Current news on CAD and its application son various fields like engineering, architecture will be beneficial for you.
How do you create electronics device with ics or chips?
Same as with discrete components:
- Define specification for desired device.
- Design desired device to perform all requirements of specification.
- Order parts, etc. needed by design.
- Construct desired device according to design.
- Test complete device to make sure it works and satisfies all requirements of specification.
This has not changed since electronics was founded using vacuum tubes and is highly unlikely to ever change. Similar processes apply in all engineering fields, whether bridges, airplanes, cars, hydroelectric dams, nuclear reactors, etc. are being built.
Data logging is commonly used in scientific experiments and in monitoring systems where there is the need to collect information faster than a human can possibly collect the information and in cases where accuracy is essential. Examples of the types of information a data logging system can collect include temperatures, sound frequencies, vibrations, times, light intensities, electrical currents, pressure and changes in states of matter.
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== == ---- == ==
V=IR
R=V/I
V=3V
I=0.075A
R=3/0.075 = 40 ohms
What is a RC phase shifter ciRCuit?
R resistor C capacitance will shift phase since the capacitor will take time to charge.
How many watts does a golf cart need to run for 1 minute?
it takes enough watts to make a cart run for 1 minute Doo doo it takes enough watts to make a cart run for 1 minute Doo doo it takes enough watts to make a cart run for 1 minute Doo doo
Where does wireless transmit and receive signal from?
It has an access point which transmit signal to the client and receive.
Which device in pstn willl convert analog to digital?
You would utilize a VoIP adapter in the conversion of analog voice signals into digital IP packets. These adapters also have the ability to convert digital IP packets into analog voice streams.
True
What do you mean by strobe gate?
strobe is enable input in a digital IC...if its made active high...it will be enabled..some IC strobe is active low..
Its function is to enable the operation of the IC..or gate or Mux...
What does requisition id mean?
When applying for a job, each position is usually given an ID so that there is no confusion when you are applying for multiple positions as to which ones are which. For some companies they call this ID a Requisition ID which basically is just a set of numbers and letters that identify a given job posting.
