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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
Which laser printer component converts AC line voltage into the DC voltages the printer can use?
As in all electronics devices that obtain power from the AC electric system, a power supply converts the AC to the DC voltage(s) needed by the electronics in the device. Depending on the needs of the device this power supply may deliver a single DC voltage or as many as several dozen different DC voltages.
What electronic function made the transistor famous?
The importance of the Transistor was that it could amplify an electrical signal.
It was thus an analog of the vacuum tube devices, and could take advantage of the circuit history and applications that had built up over the preceding 50 years.
What is the difference between oscillator and multivibrators?
Oscillator is an electronic circuit which can generate oscillating sin signal without any oscillating input with use of positive feedback
Multivibrator is a two stage RC coupled amplifier circuit which can generate squae signal without ac input
An AC has a peak value of 12 amps what is the average value of the current?
i think average value of current in ac current is zero.
non- inductive load is without motor and transformer loads are non-inductive load,
purely resistive are capacitive loads
phase angle is unity are leading PF
A non-inductive load is a load whose current does not change instantaneously.
What are the distinguishing features of an n-channel JFET from a p-channel JFET?
diff. that in n channel & p channel two p type slab in fabricated n type semiconductor & vice -versa
Why moving iron is used in both AC and DC current?
A moving iron instrument works by means of a coil that attracts a moving iron mass that is attached to a pivoted pointer which moves across a graduated scale. The iron mass will be attracted towards the coil, regardless of the magnetic polarity of the coil. So, as an AC current continually reverses the magnetic polarity of the coil, the iron mass is always attracted towards the coil, never repelled by it. Similarly, a moving iron instrument doesn't care in which direction a DC current is flowing. So the instrument works equally well with both AC and DC currents. Moving iron instruments, however, are not as accurate as moving coil instruments which, of course, are sensitive to the direction of current.
What is drop testing used for?
One type of drop testing is conducted in the electrical and industrial trades. It is used to determine the voltage drop across a resistor. It appears to work best on higher amperage circuits according to engine-light-help website.
What is the physical significance of Fermi level?
The energy level (hypothetical) at which the probability of finding an electron (and a hole analogously) is half (0.5) is defined as the fermi level.
It acts as an aid while determining the n-type or p-type characteristic of a semiconductor material. The closer Ef is to Ec the more n characteristic the material holds.
I too questioned myself the same question while I studied this. I hope this helps.
Is watching a television current or static electricity?
The operation of the television, as all electronics, involves electric currents.
If your TV uses a CRT display as it operates it happens to build a large static electric field on its face, as a side effect of that operation.
Convert everything to the same unit, for example, to Ohm. Then use the formula for parallel resistances:
1/R = 1/R1 + 1/R2 + 1/R3...
For the case of two resistors, you can also calculate the resulting resistance as product-over-sum:
R = (R1 * R1) / (R1 + R2)
Difference between Threshold voltage and knee voltage?
How many hours will a raspberry pi on 5 watts last on 5000mAH?
The Raspbery Pi runs on a 5 volt power supply. 5 watts at 5 volts is 1 ampere. 1 ampere is 1000 milliamperes. This would seem to indicate that a battery pack rated at 5000mAH (5000 milliamperes per hour) should run for 5 hours with a load that is drawing 1 ampere.
However, this presupposes that the battery is delivering a potential difference of 5 volts. Since the Raspberry Pi contains a 5 volt linear regulator on it's power input rail, the battery has to deliver at least 6.5 volts for the Raspberry Pi to function correctly (to compensate for the voltage drop inherent in any linear regulator.)
Also, if the battery's voltage is significantly higher than this, it would drain much faster and possibly damage the Raspberry Pi board.
Look up Ohm's Law for more information on these calculations.
Answerer: The load arm is a balanced mechanical arm use mainly at jetties to load and discharge petroluem or chemicals to a tank onshore. It is used at truck loading bay as well.
Editor: The load arm is a balanced mechanical arm use mainly at jetties to load and discharge petroluem or chemicals to a tank onshore. It is used at truck loading bay as well. Also the load arm is the part of a lever where the load is applied, which is the opposite of effort arm which is where the effort or work is applied.
What are the differences between digital and analog computer?
Digital Computers works on digits like-0 and 1 .
Analog Computers works in continuous variable .Input source for these computer should be Analogu. example thermometer,speedometer, ammeter.
They are mainly used in scientific,research field and medical field
Analog computers (there are still some out there) use linear combinations of voltage amplitude (or currents or frequencies or phases) from the inputs to determine the required output sequence; digital computers use two-state variables that are either "on" or "off" (true or false, 1 or 0, yes or no) as logical building blocks to derive a digital output sequence from the digitized input. Digital signals may also be converted to analog, and vice versa, so you could have a series of a/d converters, a digital computer, and d/a converters to simulate an analog computer, or a communication channel, as in digital telephones.
Answer--The difference between an analog and digitial computer is the type of data they process. Analog computers process measured data. A speedometer in your car is a common type of analog device. A digital computer processed descrete data (digits). In this case 0 and 1. Digital computers are most common. PC's, MAC's are digital computers. A big difference is an analog computer's output can vary even if the input is identical. A digital computer can be very precise. For instance, a gas pump might tell you that you pumped in 5 gallons of gas but you could have gotten 4.99 gallons or 5.01 gallons. If you asked a digital computer to add 5 and 6 together, you will always get 11. By the way. A gas pump is actually a hybrid computer. Although it processes measured data, that is how much fluid has passed through the gas hose, the data displayed to you, the amount of gas and how much you owe is in a digital format.An Analog computer uses continuous variables for mathematical operations and utilizes mechanical or electrical energy.
The difference between an analog and digitial computer is the type of data they process. Analog computers process measured data. A speedometer in your car is a common type of analog device. A digital computer processed descrete data (digits). In this case 0 and 1. Digital computers are most common. PC's, MAC's are digital computers. A big difference is an analog computer's output can vary even if the input is identical. A digital computer can be very precise. For instance, a gas pump might tell you that you pumped in 5 gallons of gas but you could have gotten 4.99 gallons or 5.01 gallons. If you asked a digital computer to add 5 and 6 together, you will always get 11. By the way. A gas pump is actually a hybrid computer. Although it processes measured data, that is how much fluid has passed through the gas hose, the data displayed to you, the amount of gas and how much you owe is in a digital format.
An Analog computer uses continuous variables for mathematical operations and utilizes mechanical or electrical energy.
Analog computers, also called continuous computers, calculate smoothly changing variables using direct analog representations of those variables (e.g. 1V per 1000 gallons of water).
Digital computers jump suddenly at intervals from one coded value of a variable to another. Most modern digital computers use binary codes to represent these values: whether the values are integer numbers, real numbers, symbolic characters, etc. The exact binary representation of each data type is coded differently. Values between defined codes for a given type cannot be represented on a digital computer.
How long is the eisenhower tunnel?
The Eisenhower Memorial Tunnel is 1.6 miles long...almost two miles long.
Gold Layered is primarily an electrical process. First a piece of base metal, normally brass, is submerged in a plating solution and then an electric current is passed through both the solution and the item being plated. There are many different solutions depending on the amount and color of gold to be plated. This process moves individual atoms of gold out of the solution and onto the item being plated. The gold plate is thus evenly deposited only a few molecules thick over the entire object. Depending on various factors, this coating can be worn away in a very short time or last quite a while. Please do not consider plating as a hobby as the process is much more complicated than this simple description makes it seem and the solutions involved contain highly corrosive acids and deadly chemicals like hydrochloric acid and cyanide. Gold Filled is a abbreviated g.f. = Lower in gold content than 10 KT, usually 1/20 or 1/12 KT. In this technique a sheet of gold is mechanically applied to the surface. Victorian pieces are likely to be unmarked, but later pieces are marked with the fineness of the gold layer, and the part by weight of the gold. For example any piece marked "1/10 12K G.F." is composed of at least 1/10 12K gold based on the weight of the finished piece. In the U.S. gold - filled pieces must be at least 1/20 by weight to be classified as gold-filled.
Which one is better GSM or CDMA mobile?
This depends on where you are, but 9 times out of 10 CDMA will provide better coverage than GSM, especially inside buildings that GSM can't penetrate.
GSM= work with SIMcards ( ATT,T-mobile) some areas have better coverage than CDMA (Verizon, Sprint, Alltel ect), the Problem with GSM is that its bandwith is not as fast as CDMA since Data travels quicker on CDMA's devices due to less steps to follow :
GSM= Data - SIMcard - device= response
CDMA= Data - Device= Response (wider bandwith as well)
so i would say that CDMA is better than GSM.
Although it has been very widely reported that GSM carriers have faster speeds than CDMA carriers. Such as AT&T has far faster speeds than CDMA networks while covered.
How do you drop 48 volts to 12 volts to run a 12 volt device?
If it is an alternating current (ac) circuit you could use suitable a step-down transformer.
If the circuit uses direct current (dc) then you could use a drop-down resistor if you know the load's current draw in amps. Then, using Ohms' Law, the value of the resistor in ohms can be calculated.
For example if the current drawn by the 12 volt load is 1 amp, you would need to "lose" 48 - 12 = 36 volts, so, using Ohm's Law (R = E / A) the resistor would need to have a resistance value of 36 / 1 = 36 ohms.
The resistor would have to be big enough to run safely without overheating, so, using the Power Law (W = E x I) its power rating would have to be at least 36 x 1 = 36 watts. That is not a trivial amount of power to dissipate - it's about the same power as a 40 watt electric light bulb - so it would be a good idea to make sure the resistor is mounted in such a way that it can lose its heat safely without burning anything.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
