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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 earthing is use in transformer?
Earthing of a transformer is done to 1:reduce the sensitivity of protective relays. 2:reduce the damage due to fault current. 3:get rid of great loss of equipment and money in case of any earth fault.
What are main components of ac generator?
north and south magnets, a coil, commutators, output, and a handle LOL
Two different instruments playing the same note sound different because of?
Harmonic structure, also known as timbre.
Why is current maximum when short circuited?
when its is short circuited there will not be any drop and hence the current will b maximum when its is short circuited there will not be any drop and hence the current will b maximum
What happen if you replace a 6.3 volt capacitor with a 10 volt capacitor?
Nothing will happen, you can go over 6.3v but never under......
What is the functioning of choke coil?
A choke coil is used in several electrical devices. The function it has is to block AC currents from passing through as it allows DC currents to pass through.
What is Orientation or induction of new employees?
The orientation of a new employee is where a person
is introduced to the entire staff in a company.
What is the rising main unit in electrical distribution?
This is the distribution of power through copper bus bar
Is plastic wrapped around the electric wires is a good conductor?
Plastic wrapped around the wire is insulator. Not a conductor. That is why it is wrapped around the conductor wire.
How do you Calculate the contact rating of relay for AC and DC?
On the side of the relay there is a name plate that tells you the current carrying capacity of the contacts. It gives you the ratings at different AC voltages and a DC rating of the contacts at different voltages.
Main difference between ac and dc motor?
Dc is an electrical term for direct current. Ac stands for alternating current. As you probably guessed a dc moter uses dc current and an ac moter uses ac current.
P.S. Most home outlets use ac current.
Determine the fundamental period of the signal xt2cos 10t 1sin4t1?
- Fundemental Period of building moving forward and backward
What is the formula for excitation voltage?
E=Vt + Ia jXS
Where E excitation voltage
Vt Terminal voltage
Stator Current Ia
Xs synchronous Reactance
Slip rings are used in AC while split rings are used in DC generators
Alternating Current for highly inductive load i.e. motors...whereas AC21 is for resistive load....i.e. heating elements. this is what you called utilization category...
mw (mega watt) is one million watt and that is a unit of electricity, whereas
kwh(kilowatt hour) is rate of consumption of one thousand watt of electricity for one hour.
AnswerFirst of all, let's get our symbols correct. There are nounits having the symbols: 'mw' or 'kwh'!Presumably, you are either trying to express a 'milliwatt' (mW) or a 'megawatt' (MW), and a kilowatt hour (kW.h)?
You cannot convert either milliwatts or megawatts into kilowatt hours, as they measure completely different quantities!
The milliwatt and the megawatt both measure power(not 'electricity'!). The kilowatt measures energy(which is not a 'rate of consumption'!).
What is the emitter base collector in 2N5777 photo transistors?
1st pin is emitter then collector and base
How is Neon used for high-voltage indicators?
The kilovolt indicator circuit I saw on the web uses resistors voltage divider with a neon lamp in parallel with each resistor of the low branch. It's not a very orthodox design. If you search electric fence tester on a browser by images you can look at the schematic. But beware, you must not connect this circuit for a long time ! It is better to use high voltage resistors (several kilovolts) with enough power. Be careful with high voltage because you don't need to touch a contact to be in danger, if you' re close enough a spark will jump the air gap. In a home 230v indicator, there is one resistor in serie with the neon bulb, the resistor value is calculated to have the difference between input high voltage and nominal voltage of the neon bulb. The voltage across a single neon bulb depends on the size of the bulb, in fact distance between the electrodes and parameters of the gas. For 2 chinese models I saw 16x6mm: 90volts, 12x5mm: 60volts for instance. You can buy the neon bulb with mounted resistor. It is not necessary to use neon bulb to measure high voltage: You can use a voltage divider and a digital voltmeter, it would be much more precise. If you want to test AC voltage, you can use a high voltage transformer but the wires must be insulated enough to withstand the high voltage.
How can you get a fake copy of city guilds engineering?
just go to the city and ask for the copy. they must give it to you.
Corona is The phenomenon of violet glow,hissing Noise & Production of Ozon gas in An Over head Lines Is called Corona Loss
Additional AnswerThis phenomenon is caused by excessively-high electric stress, causing a breakdown in the insulating properties of the air, where electric flux is highly concentrated -usually at point on energised components that have sharp edges or corners, or if their diameters are particularly small.
