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
Why is sumpner's test called back to back test?
it is so called as there are two identical transformers which are connected together such that there secondaries are in series opposition
What is the meaning inter provincial license?
a license that is valid in more than one province (or in all provinces)
Yes, and most likely due to a faulty switch associated with the transmission. If you obtain a Chilton or Haynes (on-line, ebay, or at your local autozone/advanced auto parts store)repair manual for your vehicle, you can view the schematic that will assist you in troubleshooting the problem.
How much amount of heat will produce in 22kilo ohm resistor?
If the resistor is conducting electrical current, then the power it dissipates (heat energy per second) is
(current through it)2 times (22,000)
or
(voltage across it)2 divided by (22,000).
If the resistor is connected in an unpowered circuit, or stored in a drawer, then it dissipates zero heat.
Is it possible to run a piston using either steam or an electric motor?
You can run a piston with any sort of power, steam, hydro, electric motor.
Electric motors are often used to move a piston in pumps, but the rotary type pump is much more efficient.
Today steam is normally used to move a turbine, not a piston.
Most pistons are used in internal combustion machines and are used to capture to power of the explosion.
You cannot convert Volts (or kv, 1000 volts) to watts (or mega watts, 1,000,000 watts) because volts are measure of electric potential difference between two points and watts are a measure of energy/time. However, WATTS = VOLTS x AMPS so... if you have 1000 AMPS flowing over a resistance/load with a difference in potential of 1000 volts (1 KV), you have 1,000,000 WATTS (1 MEGAWATTS) of energy consumed/time. So if a motor has 1KV potential accross its terminals and it is consuming 1,000 AMPS, it is a 1 MegaWatt motor (a large one indeed). To get energy, you have to multiply this 1MegaWatt x the time the motor runs and x a conversion factor to get to the appropriate unit of energy. Yes, I've been called a nerd before.
What power is dissipated if 800v is applied across a 10 ohm resistor?
The power dissipated by a 10 ohm resistor with 800v across it is 64 kw.
Ohm's law: current is voltage divided by resistance
Power law: power is voltage times current, so power is voltage squared divided by resistance
Don't even think about trying this. 64 kw is a lot of power. The resistor will probably explode, or catch fire. At best, the 80 amps required will trip your circuit breaker, if you are lucky.
Is 24.0 mfd a good test reading for a 24.5 mfd run capacitor with a multimeter?
That would depend on the tolerance of the capacitor. As the measured value is only about 2% below nominal and most capacitors have 10% or 20% tolerance it should be fine. However if it was a precision capacitor with for example 1% tolerance it would be bad.
How the DC generator are classified according to field excitation?
on the basis of field excitation, dc generators are classified into the following types:-1- separetly excited dc generators
2-self excited dc generators
the behaviour of a dc generator on load depends upon the method of field excitation adopted
What is demagnetising effect of DC generator?
demagnetising effect of dc generator is to reduce main field flux there by reduction in generated voltage.
agree
An ammeter has a finite resistance which is inserted in series with the rest of the circuit, increasing the total resistance and decreasing the current. A good ammeter has a very low resistance, so it shouldn't affect the circuit noticeably.
It is important that you should read see the answer to the Related Question shown below: "Would 120 volts appliances work on 230 volts in Europe?"
<><><>
This question is asking just about the motor. No electronic controls are associated with it.
<><><>
The speed will be different. The motor may heat up more lowering it's total life expectancy. Best you contact a licensed electrician that knows of European devices.
<><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
How can you tell whether current is going into or out of a node in a circuit?
When you add up all the currents going into and out of a single node, you have to wind up
with zero, or else you made a mistake adding them up.
A capacitor stores electrical charge. When the device is shut off, the charge will - over time - slowly bleed off. But immediately after shutdown, the charge is still present in the capacitor. In large capacitors, such as those found in air conditioning units, older style televisions, and microwave ovens, the stored charge can be strong enough to be potentially lethal. Service technicians have safe procedures for bleeding off the capacitor charge, but those not knowledgeable about electrical systems should not touch a chassis of above-mentioned items, even if shut off and unplugged. Stickers that say "Danger - High Voltage" mean exactly what they say.
Another Answer
A capacitor does NOT store charge; it stores energy.
The net charge on the plates of a capacitor is no different whether it is 'fully charged' or 'fully discharged'. It does not take charge from the supply and store it on its plates! It simply allows electrons from one plate to be transferred to the other, so there is no change in the overall amount of charge.
What it does do is to store energy, expressed in joules.
There are a few factors when wiring a workshop. The type of work shop and what is manufactured in it. Whether any types of chemicals or gasses will be present. Overall voltage and amperage that is to be used in the workshop. Whether there are any motor loads that are associated with the workshop.
These types of projects usually use a conduit system. The conduit system can be of three types. They can be PVC, EMT or Rigid conduit.
In Canada, Teck cable is used in these types of buildings installations. Using this type of a system keeps the labour costs lower than conduit systems.
If you want to explain the workshop in full detail by using the Discuss button on the left, a more detailed answer will be given.
Why use the synchronous generator in power plant?
The electrical power generated must be AC exactly phase synchronized with the AC on the power grid. If it is not synchronized the generators will take power from the grid and try to run as motors and probably severely damage themselves and maybe other parts of the power plant.
Can you generate direct current?
Direct current can be generated by a generator. Generators are not as efficient as alternators ( that generated AC power ). Vehicles use direct current but come equipped with alternators. The AC power is rectified ( changed to DC ) for use.
The torque which is produced during the starting of motor is simply called as starting torque.
Why does generally resistors are in kilo ohms or megha ohms why not in milli or micro or pico ohm?
First of all, let's get the units of measurement correct, which are kilohms (not 'kil ohms'), megohms(not 'magha ohms'), milliohms, and picohms(not 'pico ohms').
Resistors are generally rated in ohms, kilohms, and megohms because, generally, these are the values most widely needed in practical applications.
What are the different types of electro pneumatics valve?
Electro pneumatic valves are mechanical valves but operated through pneumatic using suitable solenoid coils.
