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Is aluminum a semiconductor?
No, it is a conductor. It doesn't conduct as well as copper, but it conducts well enough that it's commonly used in high-tension electrical lines (it weighs much less than copper and it's a lot cheaper; those two factors offset the transmission losses).
What is another name for evaporation losses?
uleate
What is the relationship between energy input and energy output and energy losses whenever transfer of energy takes place?
Input energy = output energy + losses
What is thermal energy loss?
Therma losses are heat losses, or losses of heat energy. Just one example is the idea of thermal loss through windows in a structure. Walls can be insulated, but heat energy can pass readily through ordinary window glass. On a cold day, there are a lot of thermal losses from a structure through regular glass windows.
When energy is converted from one form to another. what is usually produced?
If energy is transformed from one form to another, for example electric power to mechanical power in an electric motor, in an ideal situation there would be no losses and therefore an exact equivalent in the new form of energy. In practice there are always losses, the process is not 100 percent efficient. In the above case there will be some thermal losses due to heating in the motor windings, and some windage losses due to air resistance to the moving parts, and some frictional losses in the motor bearings. In this case the losses should not be large. In a power plant operating the Rankine cycle converting thermal energy to electric energy (see link below) large losses are inevitable, and even in the most efficient power stations more energy is lost to the cooling plant (water or air cooling) than is turned into useful output energy.
Why is it assumed that during open circuit all the losses are core losses?
Since this is an open circuit test, there is no load attached, thus all losses must be internal to the transformer.
What is the reason to use open circuit and short circuit methods to find Transformer losses?
The transformer can be tested on open and short circuit to find the iron losses and copper losses separately, which uses a fraction of the power than having to run the transformer on full-load.
Why core losses are negligible in short circuit test of transformer?
I am so sorry for your core losses
Why does the open-circuit test essentially show only excitation losses and not in copper losses?
In an open circuit test full load current does not flow, hence you wont get copper loss.
Why is copper loss negligible during open circuit test?
Copper losses are energy losses from the windings, due to the currents passing through them. During an open-circuit test, there is no secondary current (so no secondary copper losses) and the primary current is very low (so the primary copper losses are minimum).
Why rated current should flow in the secondary for short circuit test in transformer?
Open Circuit test is done to find out core losses of the transformers.which include Eddy Current Losses and Hysteresis Losses only, if during open circuit test secondary will have some load then I2R losses due to load current in secondary as well primary will be included in test results which is not desired while performing Open circuit test.
What wires do you use for an electrical circuit?
wires that have got good conductivity and less losses
Why the iron losses absent in short circuit test?
Because a short-circuit test is done at very low voltage to check the transformer windings on their maximum current. The low voltage ensures that the magnetic flux in the transformer's iron core is very low so that the eddy-current losses, usually known as iron losses, are negligible.
Under short circuit test it is said the iron losses are almost zero why?
In a short-circuit test the normal load current is passed through the transformer with minimal voltage applied. This means that the magnetic flux density in the core is also minimal, so that the only losses are the resistive losses of the transformer windings.
Why may copper losses be neglected in the open circuit test of a transformer?
Because the magnetising current is very small, so the primary losses are insignificant, while there is no secondary current, so there are no secondary losses.
How do you carry open circuit test on power transformer?
A Linear power transformer coil? use an Ohm meter and check the resistance of the coils. No resistance is an open circuit. Also check for a cross circuit from one side of the transformer to the other.
What factors affect energy losses in animals through feces urine and heat?
Some of the different factors the affect energy losses in animals through feces urine and heat are the animals bowel's.
