: 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.
As a result,current carrying electrons ï¬nd more resistance in passing through and the resistanceincreases.Figure 2 shows the voltage and current relation of a tungsten ï¬lament. From theï¬gure, it is clear that the resistance of the ï¬lament increases with applied voltage andthe ï¬lament has a dynamic resistance. The resistance at A and B can be found byusing R = V/I relation at that particular points and you can prove that R B A .Figure 2. V-I characteristics of a ï¬lament.