工業英語

The relationship between the electromotive force, the current, and the resistance was discovered by a German scientist, George Simon Ohm, at the beginning of the nineteenth century. The unit of resistance was named in his honor,

This relationship, which is called Ohm's law, can be expressed mathematically by means of the following formula:

Current=electromotive force/resistance or I=E/R

where I is measured in amperes, E in volts, and R in ohms. This means that the greater the electromotive force is, the greater will be the current; and the resistance, the smaller the current.