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Electrical Engineering
Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism.
23,056 Questions
Since they are in series you can use R=R1+R2+R3... for Total Resistance, then use Ohms Law of I=V/R and solve for I and R. (remember that V and I are also Totals, unless you brake them down at each point)
What is the concept of the kelvin bridge circuit?
Kelvin Bridge: This Bridge is a modified version of Wheatstone Bridge and provides greatly increased accuracy in the measurement of low value resistances, generally below 1 ohm.
Applications of wien bridge oscillator?
A Wein Bridge Oscillator is a oscillator which is used for the measurement of Audio Frequency.
Why Red balls are inserted in a transmission lines?
to make it visible to small planes and helicopters.. and even some time immigrating birds
Here we are given 3.1 amperes of current and are asked to find the time it takes 10 coulombs of charge to pass a given point. First ask yourself how many coulombs are passing a given point in one second. If we have 3.1 amperes of current, we have 3.1 coulombs of charge passing any given point in one second. If it takes 1 second for 3.1 coulombs of charge to pass, how long will it take for 10C of charge to pass?
The best way to do this is to find the diagrams. Do a quick image search to find the information that you need.
Where the transformer oil is circulated in the transformer and how it's cooling the transformer?
Depends on the size of the transformer. Are you are talking about a large power transformer, say 2.5MW or above? If so then the following is usually true. The core/windings of the transformer are immersed in the oil. When the transformer is energised and carrying load the winding heats up. This in turn heats the oil. The tank of the transformer is usually cool due to the air surrounding it. The hot oil moves away from the core to the cooler tank sides. This starts the oil circulating. i.e. as it moves to the side it cools down and then returns to the centre and gets heated up again. As the transformer load increases so does the winding temperature. This means that the oil has to dissipate more heat. Eventually the capacity of the oil to dissipate the heat quickly enough will be reached. If this temperature is reached before the transformer is fully loaded that damage may occur Increasing the size of the tank is one solution However, this could mean a very large piece of equipment. The normal practice is to install a cooling bank or set of "cooling fins". They are also sometimes known as radiators. Generally they are separate from the transformer and connected to it by a flow and return pipe. The flow to pipe is high up near the top of the transformer and the return is near the base. A pump is then used to circulate the oil through them. The pumps are temperature controlled. They only come on when the oil has reached a certain temperature. If this cooling is not sufficient then fans are added. These fans are positioned under the cooling banks. When they are switched one they force air over the cooling banks. This additional air flow takes the heat way faster thus cooling the oil quicker. The pumps then return it to the main tank where it is heated by the core/ windings again.
What is the Scope of work for Site Electrical Engineer?
Site engineers perform a technical, organisational and supervisory role on construction projects, setting out and determining the location for above and underground infrastructural installations involved in construction operations.
Site engineers apply designs and plans to mark out the site and can be involved in projects ranging from small scale to multi-million pound ventures. This may include civil, road, rail and other infrastructure projects.
A site engineer works as part of the site management team liaising with and working alongside architects, engineers, construction managers, supervisors, planners, surveyors and subcontractors. They share responsibility for site security, health and safety, and the organisation and supervision of material and human resources.
What is electrical impendance?
Impedance (Z) is the vector sum of a circuit's resistance (R) and reactance(X), is expressed in ohms, and is the total opposition to current in an a.c. circuit.
Resistance, expressed in ohms, depends upon the length, cross-sectional area, and resistivity of the conductor.
Reactance, expressed in ohms, can be inductive reactance (XL), capacitive reactance(XC), or a combination (vector sum) of the two.
- Inductive reactance is directly proportional to the circuit's inductance and the supply frequency.
- Capacitive reactance is inversely proportional to the circuit's capacitance and the supply frequency.
What is the symbol for a light bulb?
a circle with a cross through it a circle with a cross through it
How do you calculate Peak load on the power supply given different appliances and their ratings?
The minimum and the maximum input DC power the powersupply can have. For exemple: Imput 100 - 125 V 6 A and 200 - 240 V 3A.
Another answer which was given to this question is now in the Discussion Area. It gives advice about running small domestic motor-generator sets but does not address the actual question here which is about the kind of turbine-alternator set used in a major power station capable of generating up to 210 MegaWatts of power. Because of the highly technical details given in the question it is clear that it is probably from an exam in electrical engineering and not one on electrical wiring. The full answer to this question would take a chapter in a heavy book about the design of turbine-alternator sets, the kind usually held in an engineering/technical library! Whilst the student should really use his recommended course materials, for those who may be interested this may be a possible part-answer: : VAR means "VoltAmps Reactive". : In the ideal world there would only be purely resistive loads so that there would be no large currents out of phase with the generated voltage taken by loads having high power factors. : Such out of phase currents can easily lead to shaft vibrations between the alternator and the turbine and, if no steps are taken to improve the power factors of the loads which are causing the problem, such vibrations could quickly wreck the turbine/alternator shaft's bearings. : Real-world alternators have to handle out of phase currents but, for the reason implied by this exam question, such currents must always be minimized. : Electric power utility companies always monitor their output for the appearance of any new heavy out of phase current loads. If they see any they take strong action to enforce their supply contract terms to make the consumers who are responsible disconnect their damaging loads until the appropriate power factor correction equipment has been installed. To view or take part in the Discussion click on the View Discussion button below. <><><> Important Note: To find out how it should be done in a safe and legal manner, before you try to connect a generator to your home electricity circuits you would be very wise to read the answer to the Related Question shown below: "How would you connect a generator when the power is off?". : ALWAYS CHECK WITH YOUR LOCAL WIRING SAFETY OFFICE BEFORE YOU ATTEMPT TO CHANGE ANYTHING : - ELECTRICAL SERVICE PANEL, BREAKERS, CABLES OR OUTLETS - : ON ANY ELECTRICAL POWER CIRCUITS : IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power
at the breaker box/fuse panel BEFORE you attempt to do any work AND
always use an electrician's test meter having metal-tipped probes
(not a simple proximity voltage indicator)
to insure the circuit is, in fact, de-energized. .
Is civil engineering a good engineering field?
Civil Engineering is a very important area of engineering which relates to creating important civil structures required for the mankind.
What is the antonym for fault?
A fault is a flaw or a disadvantage. An antonym for fault would be virtue, advantage, asset, merit, or strength.
buc coupler is division between sections, for example if you have a line up of 10 panels, and it is divided into sections, so for mentnance purpose you won't required to shut down the whole up, if you would bus coupler. you can switch off the buscoupler and incomer of one side, and can done the maintenance at one without doing a complete shut down.
Silicone grease is a waterproof grease made by combining a silicone oil with a thickener. Most commonly, the silicone oil is polydimethylsiloxane and the thickener is amorphous fumed silica. Using this formulation, silicone grease is a translucent white viscous paste, with exact properties dependent on the type and proportion of the components.
What is the advantages and disadvantages of substation busbar?
There are no particular disadvantages for busbars, other than they must be insulated and occupy space, but as busbars are essential, then this is to be expected.
How do you transform into a girl?
I will assume you mean to transform into a girl from a boy. One one level, it is not possible. Feeling like you are a girl or a boy is inborn. So it is possible that despite whatever body you have now, you are already a girl.
Now, if you mean socially, physically, and or legally, here is how.
Socially:
Start dressing as a girl.
Start acting like a girl.
Learn how to speak like a girl.
Do activities that girls do.
Hang around with girls.
Physically:
See a gender therapist and get letters for hormones and surgery.
Take female hormones.
Get sex-reassignment surgery.
Legally and fiscally:
Petition the court for a legal name change.
If you attend school, register under the female name.
Get a letter from a physician saying you are a girl.
Apply for a new or amended birth certificate with the correct name/gender.
Use the amended birth records to change your social security records.
Use the amended birth records to get a new ID or license.
Get all bank and credit accounts in your female name.
