: 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.
Ohms Law defines resistance (R) as the the ratio of voltage (V) to current (I). R = V/I. If you move those variables around, you can get the formula: I = V/R. So you can see that when resistance increases, current flow will decrease. Comment. Resistance is most definitely not defined as 'the ratio of voltage to current', although that ratio may tell you what it happens to be. Resistance isn't a variable in the Ohm's Law equation.