: 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 current I is equal to the voltage V divided by the resistance R (ohm's law): I = V / R. So the power P is equal to. P = V Ã V / R = V 2 / R. So the resistance R in ohms (Ï) is equal to the square value of voltage V in volts (V) divided by the power P in watts (W):he current I is equal to the voltage V divided by the resistance R (ohm's law): I = V / R. So the power P is equal to. P = V Ã V / R = V 2 / R. So the resistance R in ohms (Ï) is equal to the square value of voltage V in volts (V) divided by the power P in watts (W):