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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
What cant be use complete a circuit to make a light bulb glow?
A simple circuit contains:
Power source - battery, wall outlet
Path - wire or other conductor
Load - light bulb
Start with a small light bulb... see if you have extra bulbs for the car, tail light bulbs for example. Hook one wire to a pole on a 9v battery, then the tip of the light bulb's connection end. Then a second wire on the side of the bulbs connection end, and return to the source.
What is the difference between an advanced electric meter and a smart electric meter?
The term SMART is generally associated with any item when it has the capability to connect to the internet. A microcontroller along with provisions for a receiver, transmitter, and local power fetches lots of functionalities into the system, including limited computation and storage functionalities and connecting to a Wi-Fi internet network.
A Smart Meter does the basic task of metering the electricity flowing through the circuit, however, it also transmits the meter data to cloud, wherein, the data is scanned, cleaned, stored, formatted, and reported in desired formats.
The end-users, can install mobile apps in their smartphones and configure the smart meter and the Wi-Fi internet connection to complete the setup.
One the initial setup is done, the users can check real-time electricity consumption and the historical usages on the Smartphone from anywhere in the world.
Various tables and charts can also be plotted for better data visualisations and analysis....
Why is percentage modulation less than 100 percent in amplitude modulation?
The operator and transmitter engineer control the modulation level. It can be adjusted
so that audio peaks produce 100% modulation, or less than 100%, or more than 100%.
More than 100% produces audio distortion in the receiver, and it also 'splatters' across
a wider part of the AM dial then it should. It sounds terrible on the radio, and it potentially
interferes with other stations.
If you add one extra bulb and the voltage remains constant, then you have doubled the current drained from the regulator.
12 Volt and One 12 Watt lightbulb drains 1 Ampere Current.
12 Volt and Two 12 Watt light bulbs drains 2 Ampere Current.
However:
If having a 24 volt powersource and you add two 12 Volt 12 Watt in serial, then you still only drain 1 Ampere Current.
NOTE:
Wattage and Voltage of bulbs may be different even if the sockets are the same.
Lower voltage on the bulb will increase the current drain, if voltage is a lot lower it might cause the circuit delivering voltage to burn out or blow a fuse. It can also quickly burn the bulb, sometimes in a fraction of a second.
It will however do little damage to add a bulb with higher voltage than the circuit is designed for. You will then only observe that you do not get the light you might hope for.
Total Current/Ampere= Combined Wattage divided by Voltage
Total Wattage = Combined Current or Ampere multiplied by Voltage.
Regards.
For the same reason it is used in transistors and ICs: its a very good semiconductor.
Note: equivalent devices have been made with germanium in the past, when most transistors were germanium. But they called them thyristors not GCRs.
What is the standard output current of a transformer when connected to an ac?
There is no 'standard' output current from a transformer. The secondary (output) current depends on the load, and should not exceed the rated secondary current. To find the rated secondary current, you divide the transformer's rated volt amperes by the rated secondary voltage.
The above cited answer need more descriptive ; a) V/Z = I, b) V/Z = I + Magnetizing current of the transformer taken from Primary side of the transformer.
What does a capacitance of 0.00036 farads equal?
A capacitance of 0.00036 farads is equal to 360 microfarads.
What is mean by 2is to 3 turns ratio Transformer what is primary turns and secondary turns?
with an ideal electrical transformer with an input current of 2 amps and an output current of 1 amp what is the turns ratio of the secondary and primary coils
Can someone get lead poisoning from handling computer circuit boards?
A person who changes a board on their computer a couple times a year, and does not eat the used board, NO
A technician who works with boards all day and does not wash his hands before handling food (eating lunch) could be at risk
A person who salvages boards for the metal content and does not use good safety practice will get lead poisoning, This is very prevalent in the third world where we ship our used computers.
What are the microprocessors that used in car?
Different cars use different microprocessors, and as cars get more sophisticated, they have more types of microprocessors. The original Prius had more computing power in it than was used, in space and on Earth combined, for the first mission to put people on the moon, I am told. That car had multiple computers for multiple jobs, and they did not all use the same processor.
How can one electrical circuit affect another electrical circuit?
In many, many ways, some of which are very hard to detect or measure. You'll have to be more specific. :)
However, we will attemt an exhaustive list anyways:
- Magnetic Induction: the currents running within two nearby circuits can affect each other
- Sparks: High-energy electrons flying from one circuit can damage another circuit they reach
- Mechanical interference: I'm going out on a limb here, but a motor attached to one circuit could tangle the wires of another
- the list goes on...
Which type of wave has a larger wavelength FM radio or AM radio?
There's no difference between a frequency-modulated wave and an amplitude-modulated
wave. Either kind can be generated and transmitted with any wavelength you want.
In the USA, however, AM broadcast stations are licensed to operate only in the band 550-1700 KHz,
and FM broadcast stations are licensed to operate only in the band 88-108 MHz. So for ordinary
programs that you listen to on an ordinary radio, the AM stations all have longer wavelengths
than the FM stations have.
As a rule a hub does not contain a repeater. Amplifiers would be used in analog communication, not digital communication.
Attenuation is a process that occurs all the time in networks; you would place a repeater in an area where the attenuation would cause the signal to degrade to the point where it wouldn't be usable. You would want the repeater to be placed before that point.
Why does a phosphorylation cascade amplify an intercellular signal?
When a protein is phosphorylated it can act on multiple down stream target. So if 1 molecule, lets say Calcium, can lead to phosphorylation of 1 other molecule which can act on 10 molecule. In this case you get a 10x amplification. This is necessary sometimes because certain states, such as, calcium mobilization is very short acting and goes a way very quickly.
Another way to look at it is that a single person can tell another person something; this person can now go and tell 10-20 other people. Also the first person fatigues easier while the 2nd does not, so that the message can get past on longer.
What is meant by dependent source?
A dependent source is a source that is dependent on, i.e. a function of, some other thing in the circuit. Often, a transistor is represented as a dependent current source, with collector-emitter current being dependent on base-emitter current times hFe, or beta-gain, limited by the collector-emitter resistor network.
What is a Variable 0 - 12V dc power supply?
A variable power supply has a control to adjust the DC output voltage from 0 to 12 volts.
It is used for testing electric project's such as amplifiers and other electric devices.
It can be used to replace other fixed voltages power supplies such as the srandard 3 volt, 5 volt, 9 volt and 12 volt units.
If the speed of radio waves, also known as the speed of light, is 3x108 metres per second, then it is also 3.333 nanoseconds per meter. (Simply invert) As such, the wave would take 333.3 microseconds to traverse 100 kilometres.
Which instrument is used to measure 500 kV AC voltage?
Volt meter; And 500kV AC voltages are not measured directly - potential transformers, or capacitors are used to step 500kV down to safe voltage levels for measurement purposes (usually 66-120 volts).
You can get a transformer that converts the UK's 230V power to 120V, but you cannot get a transformer that will convert from 50Hz to 60Hz.
Often, US equipment can work, except that they will work hotter and less efficiently on the 50Hz power. Consult your clipper and trimmer documentation - you may find that it will work just fine on 50Hz.
What is effect on amplitude shift keying modulation and demodulation due to use of transistor SL100?
The SL100 is a PNP medium power transistor, suitable for use up to ~100MHz. This can be used in the power amplifier stage, with the output connected to a tuning network/transformer + antenna for AM modulation. It's purpose, if used in this application, is to supply current (usually a voltage amplifier circuit will precede this one) to drive the antenna.
What is a carbon telephone transmitter?
What you are describing is a carbon microphone. This consists of a diaphragm behind which are placed granules of carbon. When the diaphragm vibrates due to variations in sound waves, it acts to compress the carbon granules -thus varying the resistance of the carbon granules as a whole. This variation in resistance is used to modify a current which is then amplified.
300 / 25, or 12/1.
How many capacitors do you need for to 2 amplifier?
0, but your power source will be drained rapidly, one should be the minimum, but there are a lot of x factors I can not account for
