The difference between a BJT, or bipolar junction transistor, and an FET, or field effect transistor, lies in its control and polarity; BJT is bipolar and FET is unipolar. A BJT is primarily controlled by current, while an FET is mainly controlled by voltage.Know More
A BJT relies on two different charge carriers, hole and electron for its conduction level. An FET relies on one charge carrier, either hole or electron for its conduction level. An n-channel FET has electron as its charge carrier. Hole is the charge carrier for a p-channel FET. BJTs can be npn or pnp transistors.
Other differences between a BJT and an FET are in terms of temperature stability and size. Normally, an FET is smaller with a more stable temperature than a BJT.Learn more in Electricity
The primary difference between lap winding and wave winding is the current (amperage) and voltage requirements of the generators. Generators requiring a high current with low voltage use lap winding. For a low current and high voltage, generators use wave winding. Both types of winding are required for direct current generators.Full Answer >
An ampere (or amp) is a measure of the amount of electricity, called "current," in a circuit, while voltage is a measure of the force behind that electricity's motion. In a common textbook analogy in which a circuit is imagined as a garden hose, current (measured in amps) would be the volume of water within the hose and voltage would be the pressure that pushes it onward.Full Answer >
A faradic current is an alternating, asymmetric current that stimulates muscles throughout its nerve, according to the University of Buffalo. A galvanic current is a term mostly used in medicine meaning a direct current of steady flow.Full Answer >
The difference between a cell and a battery is that a cell is a single unit that converts chemical energy into electrical energy, and a battery is a collection of cells. According to About.com expert Mary Bellis, each cell contains two electrodes and an electrolyte, a substance that reacts chemically with each electrode, generating an electrical current. Aggregating cells into a battery increases the electrical voltage they produce.Full Answer >