: 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.
One ohm of resistance is equal to the resistance of a circuit in which a potential difference of one volt produces a current of one ampere. Mathematically Ohm's law is written as: I = E/R. where I is current in amperes, E is the applied voltage (difference in potential) in volts, and R is resistance in ohms.