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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

Why is Iron overload dangerous?

Iron deposits can form in organs, particularly the heart, and cause life-threatening damage

Can you use the earth wire between room stat and honeywell board as a neutral?

ABSOLUTELY NOT!

The protective earth ground wire is only there to provide a low resistance path to ground in the event of a short circuit so as to trip the protective device. Operational current is never, under any circumstances allowed to be passed on earth ground. Use neutral for neutral and ground for ground.

CONSULT A QUALIFIED AND LICENSED ELECTRICIAN !!!!

Why is The voltage across the empty socket is equal to the line voltage?

all the sockets are always connected in parallel,due to this the voltage across each soket is same. when any socket is open then there is no voltage loss..so the votage is same like line voltage.

Does turning a DC motor on and off affect the life of the motor?

Turning something on and off shortens the life of one or more components in any circuit. In the case of a motor the start current is increased over run current so that every time you start the motor that start up current is imposed on the motor. Over time the higher current can melt the covering of the motor winding or weaken the structure of parts carrying the current. The quality f the individual parts will determine how much the life of the motor is reduced. There are also mechanical affects that may shorten life like the contact between rotor and stator.

What is function of damping relay in circuit breaker?

The anti-pumping relay is a device in circuit-breaker whose function is to prevent multiple breaker closures. For instance, if the operator gives the closing command to the breaker by pressing the close button and the breaker closes. However, a fault in the system causes the breaker to trip. Since the close command is still in the pressed condition, there is a chance of the breaker closing again and being tripped by the relay multiple times. This can damage the closing mechanism of the breaker. The anti-pumping relay prevents this by ensuring that the breaker closes only once for one close command from the control panel.

What is the qualification for government employee in Kuwait as a electrical engineer?

The government is usually pretty good in telling a prospective job seeker what is required for the job. If they are specifying electrical engineer I would think they require an EE degree from an accredited university. Also there are many specialties in EE from integrated circuit designer to a power engineer so you would have to meet specific qualifications of the job.

What are the qualifications of being a power engineer?

In the United Kingdom, to be a power engineer, one would need to have completed a City & Guilds course. One may also complete the Electrical Power Engineering BEng Honours course at university.

When you need to install permanent load bank for generators?

A load bank might be permanently installed when the generator has a large generating capacity and the connected load is very light.

How does Lenz's Law explain power loss in transformers?

It doesn't, really. The power loss in transformers is broken down into copper loss and iron loss. The copper loss comes from the resistance of the windings in the transformer and depends on the load current, while the iron loss in the magnetic core depends on the magnetic flux density and is constant if the supply voltage is constant.

Why negative impulse is applied during Impulse voltage test?

The lightning phenomena is occurred on transmission lines or sub-stations due to which a negative wave is generated hence definitely destroy the power apparatus. So for impulse voltage testing of any power apparatus one must produce a negative impulse.

What is 75 ohm?

Ohms are a measure of resistance to electric current.

You're probably talking about a 75 ohm coaxial cable. In this case, 75 ohms is the characteristic impedance of the cable.

What is diode clamping?

There are a couple types of diode clamping-- A P-N diode was often used for clamping coils of relays that produce high voltages when the relays is de-energized. Bidirectional zeners are now the best solution. Diode clamping is also a term used to limit voltage excursions generally. Zener diodes are generally used for this purpose.

What is the Reason for power loss on a 2001 tdi vw bug?

My 2001 VW New Beetle TDI lost power and gas mileage at 110,000 miles. The problem was the Mass Air Flow Sensor. It is located on the the left side of the air filter box whey you face the engine with the hood open. A black plastic air tube fits into one side. An electrical connection clips into the middle, the right side slips into the air filter box. You need a screw driver to remove two screws from the side of the air filter box and pliars to squeeze the clamp holding the air tube. It can be ordered on e-bay for about $70 including shipping and takes about 10 minutes to install.

Relation between current gain and collector current?

That's referred to as, `hfe` in transistor parlance. Essentially, since a transistor is a current operated device, the gain means that for every milliamp in at the base, the gain (times X) will be amplified through the junction of the collector/emitter.

For instance, take a transistor with a gain of 30. One milliamp in at the base will allow the transistor to pass 30 milliamps through the collector/emitter junction. Of course, there will also be a resultant voltage drop of 1.2 volts over all. -.6 volts for the base and -.6 volts through the collector/emitter junction. Remember, you're working with a current controlled device, and not a voltage controlled device like an op-amp.

What will happen if you run a dc motor much below its rated rpm?

it could overheat and become damaged if it is driving a high torque. Much better to use a gearbox.

Can I convert Single phase to three phase for resistance heating?

Single phase can't be turned into 3-phase by any reasonable means. But on the other hand resistance heating is fairly straight forward. If only the fuse rating is high enough it might be possible to rewire a 3-phase heater to run from a single-phase source.

What do I do if there is no circuit breaker for outdoor light?

If you have a light that is not being powered through a circuit breaker or fuse, you should call a qualified electrician to remove this circuit from the panel's bus and install a circuit breaker for it. Without an overcurrent protective device (circuit breaker or fuse) you have a potential fire hazard.