0
Electrical Engineering
Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism.
23,056 Questions
As current flow trough a wire by using the right hand rule of thumb a magnetic flux encircles the wire. if an adjacent wire are passive these lines of flux will generate an electron flow on that wire therefore the transfer is complete minus the efficiency of the transfer . Magnetics LINES varies as the square of the distance.
What is the working principle of AC servo motor?
A servomotor is used within a position-control or speed-control feedback control system. Servomotors are used in applications such as machine tools, pen plotters, and other control systems.
An electrostatic motor is based on the attraction and repulsion of electric charge
A Torquemotor (also known as a limited torque motor) is a specialized form of Induction_motorwhich is capable of operating indefinitely while Stall_(engine), that is, with the Rotor_(electric) blocked from turning, without incurring damage
Plz read these sentences
Eng.Irfan ullah PAk
03009142027
can u please provie answer to the above thanks vaiyanthan
What happens if you dont vacuum out an air conditioner?
The principle of an air conditioner is evaporation of a liquid, that results in cooling, the same way sweat evaporating off your skin causes cooling. The difference is after the liquid evaporates it is returned back into a liquid state by compression. The fins that surround the tubes that this gas/liquid travels around in, are there to transmit the cooling into the air by increasing the surface area. If you don't vacuum these fins the cooling effect of the evaporation does not reach the air, so the a.c. has to run longer to cool the room and you. If you clean them it will significantly reduce your energy costs, so do it.
Is a 50-20 duplex main circuit breaker adequate for a three bedroom house with 13 outlets?
No! At this time I wouldn't have less than a 200 amp service for a 3 bedroom house. Keep in mind just because there is a place to plug "stuff" into doesn't mean there is enough capacity in the wiring to handle the load. Please call an electrician. The Fire Department call would be much more expensive.
Do 2003 V W Passats have circuit breakers if so where?
If by circuit breakers you mean fuses the answer is yes they do. The 03 Passat fuse box is located behind a panel on the drivers side where the dash board meets the door. You have to open the drivers door to see it. Pry the panel out by the front edge facing you and it will pop out revealing the small multi colored fuses.
Does a tube light glow without starter?
yes..if we replace magnetic ballast with electronic ballast...there is no need of starter if we use electronic ballast.
Why are stripes of iron plates joined instead of using a single block of iron core in a transformer?
To reduce heat generated and eddy current losses in transformer's core during operation.
das
Why you provide automatic voltage regulator in the DG set?
The VAR seance the EXCITER volts and them send a rated voltage that wright down on your alternator like as EXT V. 38 To Field coil to cut the field magnets. This Voltage are 180 to 250 or above V. AC. , The exciter V. are 09 to 24 V. DC.
AnswerThe AVR is responsible for keeping the terminal voltage of the generator approximately constant for variations in load.
What is a path through which current flows?
A path through which current flows is generally called a circuit. Some might say a complete circuit to denote a "closed loop" through which electricity can leave one electrode or contact on a voltage source, travel through some conductors of some kind, and then return to the other electrode or contact on the source.
What is the difference between a GDA fuse and a S501 fuse?
To quote a Cooper Bussmann data sheet (BIF Doc #2014 - rev.6/9/97), "S501 is a European designation. In North America use GDA respectively when referencing product, except 8 and 10A."
When an open motor gets up to speed what switch takes to start winding out of the circuit?
Usually a centrifugal switch. When the rotor reaches proper speed, the weights fly out and move a set of contacts so they are disconnected, thereby disconnecting the starting circuit.
Transformers are devices that use the principle of coupled magnetic fields to step voltage up or down, or provide DC isolation in circuits. A signal transformer is a special application of a transformer that is used to couple a signal from one circuit into another circuit. The signal might be stepped up (or amplified), or it might be stepped down, or it might be coupled without an increase or decrease simply to provide isolation, impedance matching, or phase shifting from stage to stage in an electronic device.
Is Power stored in distribution system?
No. It's transported through the distribution system to load centers.
What meaning circuit breaker 400af 300 at?
The "AF" stands for the Frame Ampere rating, so in this case will be 400 Amp Frame. The "AT" stands for Trip Ampere rating, and in this question will be 300 Amp Trip.
Why 28 days test required for mcb testing why not 30 days?
The standard for testing of Miniature Circuit Breakers - IEC 60898 has arbitrarily decided on 28 days during which the temperature rise is to be measured.
The standard states: "The circuit-breaker is in the closed position, the current being established and interrupted by
an auxiliary switch. During this test the circuit-breaker shall not trip.
During the last period of current flow the temperature-rise of the terminals shall be measured."
If the characteristic can be verified for 28 days, the MCB passes the test.
Hence 28 days, and not 30 days.
Can you run a 60hz 110V motor on 50 hz 220V with a step down transformer?
NO dear we can not rotate a 110 vlolt motor on 220,but if your voltage is 110v then y can rotate it on 50hz ,no problem,but it will rotate at lower speed,
ENGR. NASEER AHMED,PAKISTAN
A brushed DC motor is internally commuted electric motor design to run from direct current power source. Brushed motor were first commercially application of electric power to driven mechanical load.
Can you make a lampshade using copper wire to hold the bulb Or will it get too hot?
It should be ok but steel wire is better because it is a poor conductor of heat.
Why different electrical devices have different fuses and how the fuses are different?
The current flowing through a cable supplying a load or loads depends on the combined power of those loads, and the size of the cable is chosen according to the anticipated load. If the cable is overloaded, then it will draw excessive current (an 'overload current') and overheat, and its insulation may eventually fail, and present a fire hazard. If one or other of the load devices develops a fault, then that device may draw significantly more current (a 'short-circuit current') than it should and it will fail. So, cables are subject to over currents -i.e. 'overload currents' or 'short-circuit currents'.
A fuse is an over current protective device. It is designed to disconnect the cable supplying a load or loads in the event of an overload or short-circuit current occurring either in the cable or in the loads. By doing so, it protects the cable as well as the load, from overheating and prevents the possibility of a fire.
All fuses work on the same principle. A fuse carriercontains a fuse link, or fuse element, which is connected in series with the cable and its load. When an overload current occurs, the fuse link melts, and creates a break in the circuit, disconnecting the cable. The fuse link is carefully manufactured so that the larger the over current, the faster it melts.
Fuses are rated in amperes, according to the maximum current they can continuously carry without melting, and are manufactured in a range of standard current ratings. What makes each fuse rating different is the cross-sectional area of their fuse link; the greater the cross-sectional area, the higher the current rating.
In your home, individual circuits are each protected by a fuse*, sized according to the current capacity of the individual circuit. These, in turn are protected by a larger fuse which protects all the circuits. The larger fuse is designed to operate only if one of the individual circuit fuses fails to operate quickly enough. By fusing individual circuits in this way, an over current should only affect an individual circuit, without affecting any of the healthy circuits.
There are a great many different types and design of fuse, according to their application and the magnitude of system voltage they are to operate. Fuses designed to operate on low voltage systems are physically quite small, whereas fuses designed to operate of high-voltage systems are physically quite large -but they all work on the same principle.
*In residences, fuses are now being replaced by miniature circuit breakers (MCBs), which can be reset after they have operated, unlike fuses which must be replaced.
What device opens and closes an electric circuit?
A switch is a device that is used to open and close an electrical circuit that is is connected into.
Why does a digital multimeter show rms voltage?
rms values refer to "root mean square" mathematical values of the sine wave of electricity. This is essentially an "average" value of the voltage being measured as voltage in any circuit varies constantly.
