The International System of Units has declared the ampere, or amp, the unit of electrical current. The symbol for ampere is "A." Electric current is defined as any type of flow of electricity or electrons through a medium.
The flow of electrons through a medium, such as a wire, causes electricity to form. Electricity and electric current can be measured by Ohm's Law. This law exhibits the relationship between electric current, voltage and resistance. It states that electric current equals the amount of voltage multiplied by the total resistance of a medium. Current is measured in amps, voltage in volts and resistance in ohms. All three variables can be found by using Ohm's Law.Learn More
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 >
Saltwater is a good conductor of electricity because it is an electrolyte solution. Substances such as salts, acids and hydroxides that also are electrolytes can conduct electric current. Saltwater is a mixture that consists of water and sodium chloride. When sodium chloride dissolves in water, the water separates the sodium and chlorine ions.Full Answer >
Two separate light switches are able to control a single light through the use of special electrical wiring and a three-way switch. A three-way switch connects the two switches and the light together, creating an uninterrupted, but controllable, circuit amongst all components.Full Answer >
There are many ways to make static electricity. To create a small amount of static electricity a person can develop a static charge by rubbing a glass rod with a silk cloth or amber against wool. The static charge will allow the glass and the amber to attract small amounts of paper and plastic.Full Answer >