: 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.
That's what Ohm's law describes. Ohm's law is often written as V=IR, but it is probably more intuitively understandable if you write it V/R = I. Voltage and Resistance are the independent variables, the current is the dependent variable. If you increase the voltage, the current increases proportionally.