Static electricity or ESDis an electrical charge at rest. This is created by an imbalance of electrons that stay on a specific surface, or in the environmental air. The imbalance of electrons is caused by absence or surplus of electrons. This creates an electrical field that is capable of in...
Electromechanical Process:When a conductor moves in amagnetic fieldand the conductor cuts the fieldflux lineselectricity is produced in the conductor. Depending on this principle allelectrical generatorswork such asDC generators,alternators, and all kinds of dynamos. ...
Electricity is defined by three major attributes: Voltage Current Resistance You've probably heard of low-voltage circuit breakers and medium-voltage circuit breakers, but what is voltage? Voltage is the "pressure" that makes an electric charge move. Current is the charge's "flow" — the rate...
The rotor is a series of large electromagnets that spins inside a tightly-wound coil of copper wire, called the stator. The magnetic field between the coil and the magnets creates an electric current. In the Hoover Dam, a current of 16,500 amps moves from the generator to the transformer,...
a motor needs a special kind of magnet known as anelectromagnet. In its simplest form, this consists of an iron bar wrapped in a coil of wire. If you pass an electric current through the wire, a magnetic field is formed in the iron bar, and it becomes a magnet, with definite north ...
To do this, a motor needs a special kind of magnet known as an electromagnet. In its simplest form, this consists of an iron bar wrapped in a coil of wire. If you pass an electric current through the wire, a magnetic field is formed in the iron bar, and it becomes a magnet, with...
We have also seen that the magnetic field will create an electric field (voltage and current) in another wire placed close to the transmitter. It turns out that, in space, the magnetic field created by the antenna induces an electric field in space. This electric field in turn induces anoth...
One urban myth says that turning on a light uses far more energy than it consumes while it is operating. Not so. It is true that when an incandescent or fluorescent lightbulb is first switched on, it requires a brief surge of electricity. But that surge is so short that it doesn't mak...
An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. It is important to understand that a generator does not actually ‘create’ electrical energy. Instead, it uses the mechanical energy supplied to it to force th...
Each one is specially treated, or "doped," with phosphorus and boron to create positive and negative sides of the solar cell, respectively. When photons hit the solar cells they create an electric field at the junction between the layers. This electric field knocks electrons loose from the ...