Electrical Engineering

For since,Ive hated you mister! For since,Ive hated you mister!

What is the question?

used to measure low Resistance since it must reach a null.

A capacitor is used in the 'back end' of a volt' xfmr to smooth out the ripple that occurs when changing from one voltage to another. Given the nature of a cap, it provides a slow rise & fall to fluctuating voltages, sort of like the struts on your car. It dampens the peaks & valleys.

If the primary stiffners of the hull is in transverse direction, that design is called transverse framing. and If the primary stiffners of the hull is in longitudinal direction, that is called longitudinally framed ship

in case of induction motor the rotor speed is less than synchronous speed giving positive slip but in case of generator the rptor speed is greater than synchronous speed giving negative slip.......

The term horsepower has several definitions, depending on usage. According to WikiPedia, the Electric Motor usage is 746 watts. One kva (kilo-volt-amp) is 1,000 watts, so you might be able to say that one kva is 746,000 watts. Unfortunately, kva depends on phase angle and, except for a power factor of one (purely resistive), kva is not the same as kw (kilo-watts). Someone else with more knowledge than I will need to enhance this answer.

XL= 2 * Pi * f * L = 6.28 * 60 * .5 = 188 ohms

Servo voltage stabilizers save the life of costlier appliances, CNC machines, electrical equipment, medical equipment, motors lab equipment etc. through connecting AC voltage which is not stabilized, and dips at one point of time and at other point of time rises to very high value. The principle of operating Servo Stabilizer involves comparing the output voltage with built in stable reference voltage source. The solid state control circuit operates the motor whenever the output voltage falls or rises beyond the preset voltage.


Precisely engineered to perfection, our servo voltage stabilizer features a solid state circuit to control the servo motor. The motor is mechanically attached to the arm of a continuously variable auto transformer which feeds to the primary of a series control buck boost transformer. The stabilizer output voltage is compared with the reference voltage & resultant error signal controls the Servo Motor providing true proportional control systems rather than on/ off circuit

Shipwrecks occured because the ship was not where the captain thought it should be. There was not a good enough understanding of how the Earth, stars and planets moved with respect to each other.

Calculus (differentiation and integration) was developed to improve this understanding.

Differentiation and integration can help us solve many types of real-world problems.

We use the derivative to determine the maximum and minimum values of particular functions (e.g. cost, strength, amount of material used in a building, profit, loss, etc.).

Derivatives are met in many engineering and science problems, especially when modelling the behaviour of moving objects.

INTEGRATION:

1. Applications of the Indefinite Integral shows how to find displacement (from velocity) and velocity (from acceleration) using the indefinite integral. There are also some electronics applications.

In primary school, we learned how to find areas of shapes with straight sides (e.g. area of a triangle or rectangle). But how do you find areas when the sides are curved? e.g.

2. Area Under a Curve and
3. Area Between 2 Curves . Answer is by Integration.

4. Volume of Solid of Revolution explains how to use integration to find the volume of an object with curved sides, e.g. wine barrels.

5. Centroid of an Area means the centre of mass. We see how to use integration to find the centroid of an area with curved sides.

6. Moments of Inertia explains how to find the resistance of a rotating body. We use integration when the shape has curved sides.

7. Work by a Variable Force shows how to find the work done on an object when the force is not constant.

8. Electric Charges have a force between them that varies depending on the amount of charge and the distance between the charges. We use integration to calculate the work done when charges are separated.

9. Average Value of a curve can be calculated using integration.

(electro) Magnets in the "track".

System Specifications:

1. Tx Frequency;

1626.5-1646.5MHz

2. EIRPG33/25dBW

3. Rx Frequency;

1525.0-1545.0MHz

4. Channel Spacing;

20kHz

Magnets make electricity by moving electrons through conductive material. This is accomplished by a variable magnetic field by either rotating a conductive wire in between magnets, or rotating magnets around a conductive wire.

Usually you would want to stay at least 10 feet away from power lines. Any conductive material you are working with also has to be at least 10 feet away (metal extension ladder).

It is because when a dielectric is placed between the charges , the dielectric gets polarized and the net electric field between the two charges decreases, hence force = charge x electric field also decreases. john

Current is regulated by the resistance of the load. That said without voltage no current will flow. Both are intertwined, without all the components you have nothing. Refresh your self with Ohm's law. E = I x R, I = E/R, and R = E/I. E = Voltage, I = Amperage, R = Ohms resistance.Visualize it like a triangle, without all three sides you have nothing. Current is produced by lines of flux cutting through a conductor. Voltage is a measure of the force or power of the current produced.

ANSWER: VOLTS are just potential it can exist without current. The evidence of this potential is evident as soon as we try to measure it since current now have a path no matter how small or large. The load does not regulate the current flow but rather the potential does. If the potential disappear so does the current no matter what load there is.

Short is short (no pun intended) for short circuit, which is a condition where unexpected current flows, often of much higher current than usual, because the load is often bypassed. Short circuit current flow can be as high as several hundred or several thousand amperes.

Some people make the mistake of saying "there is a short" when they actually mean "there is an open". This comes from an intermittent connection that causes the load to not function. If there were a true short, there would be a big spark, possible fire, and the fuse or circuit breaker would blow.

one transformer is sized for 57.7% of the three phase load, the other carries 57.7 % of the three phase load plus all of the single phase load.

find out the kva of your loads

then size your transformers

find the rated FLA of the transformers on the primary and secondary with Watt's law

add the individual currents with vectors to find the phase currents primary and secondary

then apply NEC 430.3(B)

Wire is sized to carry the load and be protected by OCPD

make sure the wire is protected via 240.21 (B) or (C) tap rules.

There are too many possible combinations of primary/secondary protection and tap rules to give a complete answer, your solution will vary based on distance between overcurrent devices and the transformers and also with your choices in regards to transformer KVA sizing. A simpler solution that is lighter, off the shelf, simpler to install and probably cheaper is to use a single three phase transformer with a 240 wye/delta connection. I think that would also gain you some noise isolation.

First, you will need to convert to the frequency domain.

ZR = R; Zc = 1/(jwc); ZL = jwL; w = 50Hz*2pi = 100pi

ZR = 25 ohm; Zc = -j80 ohms; v = 240*cos(100pi + 0)V

Second, combine the impedances, in series.

Zeq = ZR + Zc = 25-j80 ohms

Finally use Ohm's law to find the current. v = i*Z

i = 240 V / 25-j80 ohms = 2.9*e^(j73)A

2.9*e^(j1.28) has a magnitude of 2.9A and a phase of 73 degrees.

Now, you may need to convert back to the time domain.

i = 2.9cos(100pi + 73)A

Tis a Solfeggio tone. Research needs to be done as to its actual effects, but it is believed to cause stimulation of the pineal gland.

procrastinate .

A portable crank that used to connect to the crankshaft in the front of the car.

the most common non rechargeable battery is alkaline batteries. the more expensive batteries contain more lithium. the lithium batteries last a lot longer.

you can also buy heavy duty batteries. although it sounds like they should last longer..they don't. heavy duty batteries are actually a step down from alkaline.