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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

What is motor program?

The set of coordinated commands that control the programmed muscle activity mediated by extapyramidal pathways is often called a motor program.

Which motor rotate above synchronous speed?

An induction motor rotating at higher than synchronous speed would be generating power, thus would be a generator. No motor operating as a motor runs above synchronous speed.

What is the disadvantage of using shunts and series resistance with ammeter and voltmeters respectively for increasing range in circuit?

: This seems like a question from an electrical course, and is probably best answered by your course materials. : It's your test question, not ours, and there won't always be someone else to ask for the answer. Earn your diploma.

What is island mode in a distribution system?

Island mode in a distribution system is basically a distribution system providing its electricity sdupply from the source embedded in it or defined for it. In this way, no extra power is coming or going out and this closed system can provide all the necessary power from the generation units specified. Technically, the generation units are not necessarily required to be present there physically. The system operator (dispatcher) may through the use of certain equipment define how much power will flow in or which generation units will be operational.

How can you have a ground fault protection in a 3 phase 3W system?

3 phase ground fault detection on a 3 phase system requires that the vector summation of all three phase currents be measured. The vector sum of these currents should equal zero, or nearly zero for a balanced system. If a ground fault exists, then the vector sum will not equal zero. This condition must be validated using i2t techniques in order to eliminate false trips.

What is the difference between crown motors and regular motors?

The difference between crown motors and regular motors is that crown motors is a company, and regular motors are not. Regular motors, are the motors that can be found under a car hood.

For 100kw which cable size is good and how to find out cable size?

100 kw is the power drawn by the load. to calculate the cable size you need to know the voltage. From that you can calculate the current. this decides the cable size. for example if the voltage is 400Volts then the current flowing in the circuit when the load is 100 KW will be 250 amps. (100,000/400). for 250 amps to flow with out causing excessive heating of the cable the cross sectional area of the copper cable should be 150 sq mm.for a round cross section the diameter will be roughly 15mm.

What is the effect on led by increasing or decreasing current?

An LED will shine brighter as more current is pushed through it. There is a dimishing return on this - at some point, increasing current will not increase the brightness very much, and will cost significantly more in terms of power.

What is the correct way to wire an electric motor capacitor since the capacitor is not marked?

Motors that use capacitors are single-phase AC motors.

The capacitor is used to "start-and-run" the motor. The capacitor is wired between the incoming hot service wire and the "start-and-run" terminal of the motor. The other terminal of the motor is connected to the outgoing neutral service wire.

These capacitors are designed to run on AC (two DC capacitors back-to-back) so It doesn't make a difference which way round the two terminals are wired.

If the case is metal it is usually grounded to the ground wire.

Some motor "start and run" capacitors are plastic-cased so don't need any ground wire.

Sketch the fermi Dirac distribution at room temperature?

You need to know mu, which is probably in the part of the question you didn't bother to write. Wikipedia has several FD statistics curves; you'll need to decide which one is appropriate for your particular value of mu.

How many amp will reduced if voltage increases from 120 volt to 220 volt?

The voltage cannot just be increased in a circuit because there is a risk of damage, blown circuit breakers and/or fire.

However an appliance desgined to run on 220 v will use 6/11ths of the current used by an identical appliance designed for 120 v.

When and why the current navy core values were developed?

The current U.S. Navy core values—Honor, Courage, and Commitment—were officially adopted in 1992. They were developed to provide a clear ethical framework for sailors and to emphasize the importance of integrity, bravery, and dedication in both personal conduct and professional duties. This initiative aimed to enhance the Navy's culture and cohesion, particularly during a time of significant organizational change and evolving global threats.

What are the functions of the condensor annulus and phase plate?

The condenser annulus and phase plate are critical components in phase contrast microscopy. The condenser annulus creates a ring of light that illuminates the specimen at a specific angle, enhancing the contrast of transparent specimens. The phase plate, positioned in the objective lens, shifts the phase of the light passing through the specimen, which allows for the visualization of phase differences as variations in brightness. Together, they facilitate the observation of live cells and other transparent samples without the need for staining, making it easier to study their natural state.

What does RD stand for?

Among other things RD stands for Registered Dietitian

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RD stands for Ramon Daniel

What is a lossless transmission line?

A lossless transmission line is when no energy is lost during transmission of energy from a particular source to destination by a certain material, ie. copper wire. In other words, this material that transmits energy, absorbs none of the energy transmitted. No energy is lost to the material during transfer of energy. It is like saying it is an absolutely perfect conductor having no resistance.

Define latent failure?

Latent failures may occur in components that experience ESD shocks, operational shock (as in being dropped), are operated outside of the specified temperature range, etc. The component may be damaged by the event, however, may initially appear to function just fine.

Because of the event, the component's life may be drastically reduced, abruptly failing with no apparent reason. Such a failure is termed a "latent failure", as in, the original event caused a failure that remained dormant for some period of time prior to presenting any adverse effects.

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Latent failure/error are normally the results or decisions taken by designers, manufacturers and senior management. These people are usually a long way removed from the system. However the consequences of their actions or decisions which have been dormant-perhaps for a long time-may have sudden and disastrous results. Rushed or incomplete preparation is another result.