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Why would a small amount of electricity be generated with no dc excitation?
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Where does the voltage that is necessary for field excitation on the rotor originates from?
The excitation current is provided by a small self-excited pilot generator, attached to the same shaft as the alternator's rotor.
Can you amplify the electricity when you have only very small power supply or any mechanism for it?
you really can't amplify electricity. You can amplify sound but that is different. You can change the voltage but the actual power will not change because as voltage is raised current is reduced. you can only increase power by increasing the mechanical input to a generator which will increase the electrical power as well. The conservation on energy says that power cannot just be created. It needs to come from some where either mechanical or thermal. Following the conservation of energy, you can convert kinetic energy into electric energy using a (relatively) small amount of electricity - this is what a synchronous generator does. A small amount of electricity is used to create a magnetic field; the stronger this field, the more energy can be "pushed out" of the generator; this energy must come from the kinetic energy stored in the spinning machine. In this way, a synchronous generator can be thought of as an electricity "amplifier".
Most of the electricity used in the world is generated by?
The majority of electricity is generated from fossil fuels, coal, oil and gas. Fossil fuels need to be replaced by other sources as the resources we rely on are becoming more scarce. Increasingly, renewable energy sources are being used such as wind, solar, hydro-electric, tidal but these represent a small percentage of the total generation. Nuclear power has had its share of problems but in the twenty first century, it is making a comeback. Better controlled and safer than early nuclear power stations, new stations are being constructed.
What are the small glowing particles in laser beam?
usually dust of some kind, occasionally water vapor, reflecting the laser light. I am assuming, of course, the part of the beam outside the excitation tube.
How does a permanent magnetic generator work?
Coils are rotated past these magnets which causes the electrons in the coil to align in a particular way. This causes current to move in that direction. The power is actually generated as the coil wires pass through the lines of flux from the magnet.If you would like to see these lines of flux you can! Put a piece of paper over a magnet and sprinkle some iron filings on the paper. Tap the paper a few times and the flux lines will start to appear. A wire passing through these lines generates a small current flow. The faster you can make this action repeat, the more flow. Many wires are coiled together to make this action occur so often that usable power is made.
How does electricity help a generater work?
Generators create electricity, where there is none in the first place. Power is provided to rotate coils inside each other. The more power that is required, needs more force to turn the coils, which become heavy with increased load. One set of coils is made into a magnet, by passing a controlled amount of electricity through them, to stabilise the amount of voltage and current required. Ironically, this requires electricity to produce electricity and is known as an 'excitation' current. This is sometimes provided by a separate unit on the generator, which has permanent magnets inside it and can produce a small excitation voltage to get things going. Excitation current is then provided by circuits running off the main output.
What is a bimetallic strip used in?
Bimetal strips can be used for thermocouples. The two metals will have different expansion rates and the difference will generate a small amount of electricity. The electricity generated can be collated to a given temperature. Your mom
Do telephones use a small amount of electricity?
If your telephone came with a charger then yes it uses a small amount of electricity. This is what the charger does, it replenishes the electricity that the telephone used while not connected to the charger.
What best describes the events of excitation in excitation-contraction coupling?
cross bridge formation "Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
Is it possible to generate electricity from rainwater in a downspout with small turbine's in a series and store the energy?
Yes, this would be a simple hydroelectric machine and the electricity generated could be stored in a battery
Why do cell phone chargers use electrity when they are not pluged into phone?
There is a certain small excitation current that is generated by the step down transformer in the charger. It is that current that keeps the charger warm to the touch even when there is no phone plugged into it.
How can you get electricity from water?
One of two ways: 1. Drop large amounts of water through turbines (generators) and electricity is created in the turbine windings. 2. Press water at high pressure through micro-tubes in a disk of glass. A small amount of electricity is generated. But, it takes electricity to pump the water up to high pressure, so no new energy can be created.
How electricity gathered?
by wires <<>> Electricity is not a collectible commodity. It is generated and distributed as the demand requires. Small amounts of DC electricity can be stored in a capacitor but is not viable as an AC source. Electricity is distributed by wire conductors.
What describes the events of contraction in excitation-contraction coupling?
cross bridge formation "Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
Can a bicycle paddle be used as a turbine to generate small amount of electricity?
Yes, it can. But you will need a great amount of force to rotate it.
What is the process of excitation contraction coupling?
cross bridge formation "Excitation-contraction coupling" connects muscle fiber excitation to the muscle fiber contraction (cross bridge formation). During contraction, myosin heads form cross bridges many times-with each cross bridge generating a small amount of tension in the muscle fiber.
How energy is used today?
A small amount of electricity production, and some heating - mostly water.
