: a very large amount or number: an amount that is much greater than what is necessary. A plethora of books have been written on the subject. a plethora of information. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples. a very large amount or number: an amount that is much greater than what is necessary. A plethora of books have been written on the subject. a plethora of information. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples.
Ohm's law defines the relationship between the voltage, current, and resistance in an electric circuit: I = V / R. The current is directly proportional to the voltage and inversely proportional to the resistance.
The best way to explain these terms is to compare them to water. Voltage (V) is the potential for energy to move and is equivalent to water pressure. Current (I) is a rate of flow and is measured in amps. Ohms (r) is a measure of resistance and is equivalent to the water pipe size. These three terms are related to each other with a simple formula that reads, current is equal to the voltage divided by the resistance. I=V/r.