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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
Is there any difference between dc and ac bulb?
Answer Yes you can use a AC rated bulb on DC, When using an AC bulb on 110volt DC you would need to double the wattage of the bulb to get the same amount of light output. So if you need 50 watts of light you would need to use a 100 watt bulb on 110 volt DC. One benfit of using DC is the bulbs last longer! Hope this helps. It is important to understand that 110 volts AC is also referred to as "effective voltage" or "DC equivalent voltage". In reality, the true voltage at the wall outlet is anywhere from 311 to 340 volts peak to peak alternating current in the U.S. at 60 cycles per second. A cycle is a sine wave starting at zero volts at the short slot on the outlet swinging negative to approximately 160 volts negative in respect to neutral or ground then going to approximately 160 volts above ground or neutral 120 times per second. The 110 volts is derived by dividing the peak to peak voltage by two, then multiplying .707 root mean square, which equals the term 110 to 120 volts alternating current.
Answer
The original answer is incorrect. An incandescent lamp will work on a.c. or d.c. and will provide exactly the same power at the same voltage. This is because 110 V d.c. provides exactly the same heating effect as 110 V a.c.
7805 ic is a voltage regulator,up to 5 Volts can maintain.
How to calculate heat produced in the resistance?
It takes approximately 4.184 Joules of heat to raise the temperature of 1 gram of water 1 degree C. 1 Joule is the energy of 1 Watt for 1 second (or 3,600,000 Joules equals 1 Kilowatt-hour). In more real world numbers: It takes 69.7 watts 1 minute to heat a liter of water 1 degree C; or 146.6 watts in 1 minute to heat a gallon of water 1 degree F. A watt is a watt, weather it comes from resistance, radiant or induction. The only variations will come from the efficientcy of the heat source's design and how it is being used.
How can a broken wire affect a series circuit differently than a parallel circuit?
In a series circuit, all the current passes through the one circuit. Any break will totally remove power from all of the circuit.
Parallel circuits have more than one branch where the current can flow. A broken wire will only affect one part, the rest of the circuit will still pass current.
In a series circuit, all the current passes through the one circuit. Any break will totally remove power from all of the circuit.
Parallel circuits have more than one branch where the current can flow. A broken wire will only affect one part, the rest of the circuit will still pass current.
How do you increase the frequency of Alternating Current?
There are two ways. If you want to increase the frequency by a huge amount and you want to do it on a permanent basis, install more magnets. An alternator that has one pair of field magnets and that turns at 3600rpm will generate 60-hertz electricity. If you put two pair of field magnets in it and turn it 3600rpm, it will generate 120-hertz electricity, and so on and so forth. (The other side of that is, if you want a certain frequency of electricity, the more pairs of magnets you install the slower the alternator has to turn. Install four pair of magnets in the generator, and you only need to run the engine at 900rpm--which makes it much quieter, a big advantage if the generator belongs to the army.) If you just need to adjust it a little, simply rev up the engine. If you have a generator that makes 60hz power at 3600rpm, accelerating the generator to 3660rpm will cause it to make 61hz electricity.
When a voltmeter is connected to a resistor what will it read?
If you place an OHM meter across a resistor, it will read resistance.
An OHM meter set to read voltage will read any voltage present.
So, if you pick up a resistor, connect it to a volt meter, in theory, no voltage will be present. Unless you're feeding some sort of electricity through it.
I'm certainly not an electrical engineer, I do however use a volt/ohm meter occasionally. A volt/ohm meter is a dual/multi purpose piece of equipment.
Diff between electrical and electronics?
Where as "Electronics" relates more to the complex functions performed within a given device, more often now days by circuits comprised of many micro electronic sub components that make up the structure of a single micro electronic component. Example: a typical CPU chip would / could contain thousands of individual transistor circuits within a device no bigger that the size of your small finger nail with room to spare.
In short: electrical circuits handle transfer of energy - electronic circuits handle transfer of information
what is the main difference between electrical and electronics ?
In short: electrical circuits handle transfer of energy - electronic circuits handle transfer of information
How are wind turbines transported?
Energy can not be created or destroyed but only changed from one form to another. Wind energy is changed to mechanical energy of the turbines. The turbines can then generate electricity.
What is a analog-to-digital converter chip?
Its an IC which converts the analog signal at its input into digital output suitable for digital applications. It is an essential part of any digital system
What properties are desirable in semiconductors?
A piece of intrinsic (pure) silicon at room temperature has, at any instant, a number of conduction-band (free) electrons bthat are unattached to any atom and are essentially drifting randomly throughout the material. Also, and equal number of holes are created in the valence band when these electrons jump into the conductance band.
What is the difference between linear and non linear sensors?
Linear Pipeline
Non-Linear Pipeline
Linear pipeline are static pipeline because they are used to perform fixed functions.
Non-Linear pipeline are dynamic pipeline because they can be reconfigured to perform variable functions at different times.
Linear pipeline allows only streamline connections.
Non-Linear pipeline allows feed-forward and feedback connections in addition to the streamline connection.
It is relatively easy to partition a given function into a sequence of linearly ordered sub functions.
Function partitioning is relatively difficult because the pipeline stages are interconnected with loops in addition to streamline connections.
The Output of the pipeline is produced from the last stage.
The Output of the pipeline is not necessarily produced from the last stage.
The reservation table is trivial in the sense that data flows in linear streamline.
The reservation table is non-trivial in the sense that there is no linear streamline for data flows.
A single Reservation table is needed for the evaluation of different functions.
Multiple Reservation tables can be generated for the evaluation of different functions.
Why are the 5 parameters important?
so disabled people know how far there walking (wheeling if they have no legs)
What are advantages and disadvantages of full wave rectifier?
- advantage - less ripple, possibly allowing use of less expensive filtering and regulating circuits
- disadvantages - more parts and/or more expensive parts needed in rectifier circuit
Differences between a triode and a diode?
A triode refers to a vacuum tube amplifier or switch of the simplest form. It has three parts: A heated cathode, a control grid and an collection plate anode.
Electrons are emitted from the cathode and drawn towards the positive anode. Interposed between the two is a control grid that controls the cathode-to-anode electron flow by being charged appropriately, for example a negative charge (ground) on the grid will hamper the flow since the negative electron charge on the grid will obstruct the electron flow to the positive anode.
There are a number of variations in electronic tube designs. Even though tubes have been supplanted by solid state designs generally, they still have many valuable uses.
A transistor is a solid state device made of "P" and "N" type materials so arranged as to modify the current through it to amplify or switch current flow.
There are also many types of solid state transistor designs and they are now far more common than electron tubes.
the difference one is a voltage amplifier and the other is a current amplfier that is the major difference.
Further important differences:
Vacuum-tube triodes need some hundreds of milliwatts to watts just to light the filament/heater. This is wasted power that can appear as waste heat in the circuit, and reduces the electrical efficiency of the vacuum-tube triode. Triodes also have limited lifetimes, commonly due to the filament/heater burning out, or losing its electron emission. Transistors have no such limitations and are (i) much more efficient, (ii) can run at much lower power, and (iii) have very long lifetimes.
Vaccuum-tube triodes cannot be made much smaller than around 10 mm/half an inch in diameter, and maybe the same length. Transistors can be made at the nanometre scale, so transistor electronics are much more compact. Imagine putting together a USB memory chip with (at least) 32,000,000,000 triodes!
Conventional triodes are able to operate to about 5 GHz (5000 MHz). Some special valves can work at higher frequencies, about around 100 GHz is the limit. Such valves are large, expensive, and have high noise figures. Low-noise, small, cheap transistors exist that can easily work past 100 HGz.
What are advantages of AM over SSB?
Complexity of the receiver.
SSBSC says it all: Single Side-Band, Suppressed Carrier
The spectrum of an AM signal includes two (mirror) sidebands, on either side of the carrier (the nominal AM frequency on the dial). By suppressing a sideband and the carrier, the transmitter can spare the energy that would otherwise go into those signal components, which can represent two-thirds of the total energy in a standard AM signal.
This comes at a cost of higher complexity in the receiver, since it needs to recreate the missing parts of the signal before it can demodulate it. And since there is no carrier frequency, a superetherodyne receiver (that can lock on to the carrier, like all modern AM receivers) will not work; other strategies must be used to compensate carrier drift.
What is difference between transducer and transmitter?
today the general rule of thumb is that if the pressure sensor has a millivolt (e.g. 30mV or 100mV) or non-amplified output it is a pressure transducer. If the pressure sensor has a voltage (e.g. 0-5Vdc, 0-10Vdc or 1-5Vdc) output it is an amplified voltage output pressure transducer. If a pressure sensor has a current loop output (e.g. 2 wire 4-20mA or 3 wire 0/4-20mA) it is a pressure transmitter. Simply we can tell as Transducer: Any physical Quantity is converted into Electrical Signal. Transmitter: to make the amplified RF electrical signal to radiation with help of Electric and maganetic signal.
Potential difference = Current * Resistance
so putting in the values of p.d. and current and finding the value of resistance gives a value of 40 ohms.
Why n type and p type semiconductors have gauge factor as negative and positive respectively?
An n-type semiconductor is typically pure silicon, doped with a Group 5 element, such as gallium.
Silicon has four (4) electrons in its valence shell, while gallium has five (5). Therefore, when they bond, the fifth electron is promoted to the conduction band as the other 4 have been filled up. This is also called a donor atom.
Now, since there are free electrons in the conduction band, they carry 'extra' negative charge. Thus, it is called an n-type semiconductor.
The p-type semiconductor is similar, except a Group 3 element is used, such as boron. This has 3 valence electrons, creating a positive charge carrier (hole) in the lattice. Thus, there are more positive 'charges,' making it a p-type semiconductor.
Why you use ac circuit than a dc circuit?
First easy generation of electrical energy at low cost is by the phenomenon of electromagnetic induction
By using generators, ac and dc can be produced. AC by using slip rings and DC by using split rings.
The electrical power loss is mainly in the form of production of heat which is also known as I2R loss. To reduce such unwanted loss, we have to reduce the resistance. But that has its own limit. So better reduce the current. This is possible only when the voltage is stepped up to a larger extent. This is done using step up transformers. Only ac can be used in transformer and not dc.
Thus ac is much more preferable to dc.
More Information:
ac is prefer over dc because dc is more dangerous then ac if voltage is high it can kill a person
What is the value of a resistor with brown black red and silver?
That would be a 200 Ohm resistor, and you didn't mention the tolerance, so I'm guessing you didn't see another band which means the tolerance would be at 20%
How much forward diode voltage is there with the ideal diode approximation?
Consider ideal diode to be connected in series with resistor of 6k
Silicon diode forward bias voltage = 0.7 volts
Current across 6k resistor = (5-0.7)/6000 amperes
Voltage across {resistor + diode}=4.3 + 0.7=5v
If silicon internal resistance is 6k then voltage across diode=5v
If external resistance is 6k and diode resistance is negligible then voltage across diode=0.7v
Amps are a measure of current flow in an electrical circuit and represent the physical number of electrons passing a point in a circuit per second. 1 Amp of current flowing in a circuit means that every second 6.242 x 10e18 electrons goes past a point on the circuit.
Volts are a measure of how much energy each electron has with reference to another point. A voltage is a difference in energy and has no meaning without a reference point. 1 Volt means that for every 6.022 x 10e23 electrons, there is one joule of electrical energy.
Ohms are units of resistance, how much opposition the conductor provides to the current. Resistance is related to the phyiscal size of the conductor.
These three units relate to each other in Ohm's Law: Voltage = Current x Resistance because if there is more opposition to the current, there needs to be more energy to make it flow.
A common illustraiton of an electrical circuit is a water pipe: Amps is how fast the water is flowing, Voltage between two points is the pressure difference and Ohms describe how big the pipe is and if there is any obstruction inside it.
Is capacitor polarity sensitive?
Some capacitors are polarity sensitive; some are not. It depends on the design. Electrolytic capacitors, for instance, are polarity sensitive, while ceramic disc capacitors are not. You can generally tell, if the capacitor is marked with polarity signs, such as + and -, if it is or not.
