please help
2007-03-06 10:59:12 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
Generally, electric current is passed through coils of insulated copper wire. This makes a magnetic field. Because the coils are positioned around an iron core, the magnetic field strength is greatly increased (about 1000 times). Two or more magnetically coupled poles in a properly designed mechanism can be made to do work. Think electric motor.
Less frequently, an electric (not magnetic) field can also be used to perform work. Examples are the Xerox photocopy process and electrostatic air purifiers.
Technically, light bulbs and space heaters also do work because they produce heat.
2007-03-06 11:13:44 · answer #1 · answered by Diogenes 7 · 0⤊ 0⤋
Electrical work is defined as the product of voltage and charge.
2007-03-06 19:08:11 · answer #2 · answered by Anonymous · 0⤊ 0⤋
It is used to run motors to move objects and heating elements to cook food.
2007-03-06 19:06:36 · answer #3 · answered by rscanner 6 · 0⤊ 0⤋