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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
LRC parallel circuit contains its component in parallel connectio. It contains inductor, resistor and a capacitor. A parallel circuit is a closed electrical circuit in which the current is divided into two or more paths and then returns via a common path to complete the circuit
Can you use a dc series motor as a prime mover for a dc generator. if not why?
A DC series motor would be ill-suited to this application.
There would be times when the generator would be only lightly loaded and would present only a small mechanical load to the motor. Under these conditions the current in the field winding of the motor would become smaller and it would turn faster to generate the counter EMF necessary to balance its supply voltage. This could result in damage to both the motor and the generator.
Please see the link.
Is the tolerance range for a 2600-ohm resistor with a tolerance of 15 percent 2210w-2990w?
Yes, that looks right.
What is mean by pick up current?
Pick up current refers to the amperage required when energizing an electrical circuit. For example, when turning on an electic motor the amperage drawn while starting could be 5 to 10 times higher than when the motor is running. This is why the lights in your house may dim for a moment when the furnace blower starts, or in your work shop when you start a cicular saw or other large power tool.
Will starting current on a motor trip a gfci breaker?
A GFCI measures difference in output to return current.
A Overload breaker in your panel is what trips from too much current. many are time delay and will not trip immediately from the less than a second of start up current spike.
Does it matter if the voltage leads the current or the current leads the voltage?
Yes. If voltage leads the current, the impedance is inductive (this would be the case if the load is a motor). If current leads the voltage, the impedance is capacitive (this would be the case for a CFL light bulb).
What are the examples of dependent sources?
A: power company have to have a separate source of power if and when the power faults. To run the computers whereby operators can maintain control. They do have UPS but the power from the jet will not last forever. And the source if it is planned right should come from out of state in case of an earth quake for an example.
When did the delivery of current expected to increase during defibrillation?
delivered current during defibrillation is expected to increase with which of the following?
Associate engineer also known as an assistant engineer. only different company has a different term to name it..
What do others see as your strengths wiki answer?
I'm a responsible in times in works and always accomplish all duties.
All chassis/frame grounds are connected to Earth ground.
Your current will be 30/R Amps. Where R is the resistance in Ohms.
An advantage of having household circuits in parallel is that?
If they were in series you would have no power every time a tool or light bulb broke down
A safety device that uses an electromagnet to shut off the circuit is called a?
A safety device that uses an electromagnet to shut off the circuit is called a contactor.
What size wire do you need for 440 three phase welder on an eight foot run?
The wire size depends on the amperage, not the voltage. The fact that the welder runs on 440 volts does not affect the wire size!
You need to ask this question instead:
What size wire do you need for a three phase welder on an eight foot run if the nameplate amps are 45A?
What is the maximum current value that can be measured with an analog VOM?
Unfortunately that varies with the model of VOM, consult the users manual.
Why neutral link sometime used in earth link?
Sometimes the neutral is used instead of the ground/earth but it never should be. Using it that way is a violation of code and a demonstration of the laziness and irresponsibility of the person doing the wiring.
Do fuses protect against - A short circuits B overoading C lightning surges D large ground faults?
Short circuits.
Parallel operation of single phase transformer?
It is required to connect a second transformer in parallel with the first transformer if the load exceeds the rating of the transformer shown in Figure 1.46. The primary windings are connected to the supply bus bars while the secondary windings are connected to the load bus bars. During paralleling of the transformer, similar polarities of the transformers should be connected to the same bus bars shown in Figure 1.46. Otherwise, the two emfs induced in the secondary windings with incorrect polarities will produce the equivalent of a dead short circuit shown in Figure 1.47.
The following conditions are important for parallel opera-tion of transformers:
- The voltage ratings of both the primary and the secondary of the transformers should be identical. Small differences are permissible if the resultant circulating currents can be tolerated.
- The connections of the transformers should be proper with respect to their polarities.
- The percentage impedances should be equal in magnitude and the X/R ratio must be the same to avoid circulating current and operation at different power factors.
- The equivalent impedances must be inversely proportional to the respective kVA ratings.
The above conditions must be satisfied by paralleling transformers of identical ratings of the same make/model. With different kVA ratings of even the same make/model, the effects in steps 1, 2 and 3 may appear in undesirable amounts. Step 2 must be carried out satisfactorily even if steps 1, 3 and 4 are slightly modified.
Figure 1.46 Parallel Operation of Transformers
Figure 1.47 Parallel Operation of Transformers with Incorrect Polarities
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Applications of vector calculus in electrical engineering?
Vector calculus is applied in electrical engineering especially with the use of electromagnetics. It is also applied in fluid dynamics, as well as statics.
The cicuit braker should only trip when there is too much current running through it. Check to see what the braker is rated for (maybe 10 or 15 amps). Then take stock of what equipment is in that circuit (maybe a couple of lights?) and estimate how many amps the circuit should be drawing (maybe two or three). If there aren't a million lights plugged in to this circuit then chances are the light fixture in question is shorting out when you turn it on.
Amperes are a unit of electrical current flow, in coulombs per second. Volts are a unit of electrical potential difference, in joules per coulomb. The two units can not be converted without some intervening device characteristic such as resistance or power.
