E = 10 volts and R = 5 ohms
therefore C = 10/5 or 2 amperes
In order to indicate fractions or very large values of the ampere, volt, and ohm, it is customary to use the following terms:
Milli-volt = 1/1000 of a volt
Mill-ampere = 1/1000 of an ampere
Kilo-volt = 1000 volts
Meg-ohm = 1,000,000 ohms
The Watt
It is no doubt perfectly plain that the water in a certain size of pipe at a pressure of 100 lbs. is more powerful than a stream of water in the same size of pipe at 25 lbs. pressure.
Likewise a current of electricity represents more power at 100 volts potential than the same current would at 25 volts. The unit of electrical power is called the watt. A watt is represented by a current of one ampere flowing through a wire at a potential of one volt.