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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 ripple voltage in 12 volt power supply?
A: Ripple is a residual voltage evident as voltage following the AC input frequency. The ripple magnitude is a function of not enough of both filtering capacitance or overloading the output. Increasing capacitance will reduce the ripple or reducing the loading
For any appliance or lamp to operate at its rated power, it must be subjected to its rated voltage. Every branch of a parallel circuit is subjected to the same (supply) voltage. This is the main reason; the secondary reason is that any break in a series circuit will de-energise all the appliances connected to it!
How does a phase leg connect to a neutral in an electrical circuit?
A phase leg connects to the neutral through the connected load.
What are the application of ac generator?
A DC generator is a machine that converts mechanical energy into direct current electrical energy.
A longer answer
A DC generator is an electrical machine which produces direct current electricity. It must be turned by a prime mover which can be an internal combustion engine - driven, usually, by diesel oil or gasoline - or can be a turbine, driven either by superheated steam or by water falling from a reservoir. (The latter is known as "hydro-electric power generation").
For more information see the answers to the Related Questions shown below.
The only requirement would be the distances in front and on the sides of the service boxes for access. 3 feet.
What is salient pole construction details?
'Salient' means to 'stick out', so salient poles stick out from the machine's shaft, as opposed to shafts which are slotted to contain its windings.
Application of mathematics in engineering field ppt?
When trying to deliver a complex topic to a large audience creating a power point presentation is useful. You can highlight the key topics of the application of mathematics in the engineering field using such a tool.
Which is used for high speed application bjt igbt mosfet triac?
supposed to be MOSFET.
but i also depends on your working freq.
What is ADSL contention ratio?
ADSL Contention ratio is the ratio of potential maximum demand on actual bandwidth.
In other words if there are 50 people using the same bandwidth of a 8Mbps ADSL line then the contention ratio is 50:1.
This in turns means that the actual bandwidth that any one of those 50 users will receive is far less than the 8Mbps.
What electrical characteristics remains the same during normal residential electrical use?
The voltage level
When you increase voltage (V) then, to get the same total power (W), the current (I) must be decreased. This result comes from the Power Law:
Power = voltage x current
Ohms Law does not deal with power at all, it deals only with the relationship between voltage, resistance and current:
Voltage = resistance x current
M is a si siffix for mega. It means million. 20 mega-ohms is 20 million ohms.
What is leakage resistance in RC circuit?
Leakage resistance in any circuit is resistance less than infinity where it is not expected, such as across an insulator. In the ideal sense, all circuits have leakage resistance because no insulator is perfect, but we usually ignore this except in special situations because it does not normally matter in real applications. In an RC circuit, leakage resistance would most typically be across the capacitor.
As the motor is drawing 9.7×110 = 1,067 watts (or 1.067 kW), and delivering 1.25×746 watts (or .9325 kW) of mechanical energy, it should release 1,067-932.5 = 134.5 watts (or .1345 kW) of heat.
If three lamps are connected in parallel and one blows out, the current in the other two does not change. This assumes that the net change in total current does not cause the power source to change voltage.
How do you find the secondary to primary transformer voltage ratio?
Turns Ratio = (Primary turns / Secondary turns) To calculate the turns ratio you have to actually know the number of turns or wraps on the primary and secondary coils. Nobody knows that usually the manufacture of the transformer doesn't even know. So what you can use as and equivalent is to calculate the voltage ratio. So what you typically need to look for is the Input voltage and divid it by the output volatge. Usually that would be as follows; (Primary Voltage/Secondary Voltage) = Voltage Ratio
Where can one learn more about sinusoidal?
One can learn more about sinusoidal through online resources such as Wikipedia. It is a complicated topic and is best explained by somebody who understands the subject. Try contacting local geography professors to find out more.
How do you calculate power angle of a synchronous generator?
tan (phi)= (V* sin (theta) + Ia*Xs)/(V*cos (theta) +Ia*ra)
theta is power factor angle
torque angle= phi-theta
Why graval use in electerical sub station grid station?
gravels are used in electrical sub stations to to keep the station clean i.e to avoid the unwanted grass and other greeneries because oil from transformers and other equipments may fall on them and which may anyhow cause fire hazards. But in case of gravel oil sweep to the ground through them.
The invention called a light bulb is a round item that gives out light when it is supplied with the right kind of electricity. It was first invented and patented by Thomas Edison and is used world wide.
A light bulb lights a room by just a single switch! Electrical current flows through a filament which resists the flow of electricity. This causes the filament to get hot and glow. The filament doesn't burn up because it is in a vacuum inside the glass bulb OR in an inert gas. This allows it to glow brightly for a sustained period, making it useful as a source of light.
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The incandescent light bulb, incandescent lamp or incandescent light globe is a source of electric light that works by incandescence, (a general term for heat-driven light emissions which includes the simple case of black body radiation). An electric current passes through a thin filament, heating it until it produces light. The enclosing glass bulb prevents the oxygen in air from reaching the hot filament, which otherwise would be destroyed rapidly by oxidation. Incandescent bulbs are also sometimes called electric lamps, a term also applied to the original arc lamps.
Incandescent bulbs are made in a wide range of sizes and voltages, from 1.5 volts to about 300 volts. They require no external regulating equipment and have a low manufacturing cost, and work well on either alternating current or direct current. As a result the incandescent lamp is widely used in household and commercial lighting, for portable lighting, such as table lamps, some car headlamps and electric flashlights, and for decorative and advertising lighting.
Some applications of the incandescent bulb make use of the heat generated, such as incubators, brooding boxes for poultry, heat lights for reptile tanks, infrared heating for industrial heating and drying processes, and the Easy-Bake Oven toy. In cold weather the heat shed by incandescent lamps contributes to building heating, but in hot climates lamp losses increase the energy used by air conditioning systems.
Incandescent light bulbs are gradually being replaced in many applications by (compact) fluorescent lamps, high-intensity discharge lamps, light-emitting diodes (LEDs), and other devices, which give more visible light for the same amount of electrical energy input. Some jurisdictions, such as the European Union are in the process of banning the use of incandescent light bulbs in favor of more energy-efficient lighting.
