: 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.
For current to complete the electrical circuit it must flow from the voltage source (B1) and pass through both resistor 1 (R1) and resistor 2 (R2) and then back to B1. The total resistance in the circuit is the sum of the two resistor values (measured in ohms, denoted by the Greek letter Î©).