: 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 the wire in the coil has resistance, the current is determined using ohms law, I = V/R. The current is proportional to the voltage, and inversely proportional to the resistance. Note that the resistance increases somewhat as the wire heats up.There can only be more voltage and less current by changing the coil.nswers. Best Answer: The following is in relation to an electromagnet, but generally applies to magnetic fields generated by electric current. The magnetic field is proportional to the current in amps and the number of turns of the conductor about the core (ampere-turns).