What is the main purpose of a resistance in a circut.
Nomy-the wanderer said:I didn't mean by functional that it wouldn't work without it, but i meant there would be no purpose for the circuit without a resistance, practically, most of the the machines, and electrical devices are regarded as resistances..
Nomy-the wanderer said:Resistances in the wire, would produce a lot of un-needed heat, that would cause damage to the circuit, but inductance is a resistor current wise...
Q_Goest said:If you look at a typical piece of electronic hardware, you'll find dozens of resistors stuck all over the circuit board. I'd assume that none of these are used to create heat. So what are these resistors used for?
Antiphon said:If you put a load on the motor shaft, there will be a current flowing
into the motor and a voltage across the motor and will LOOK like a
resistor. This was what Nomy's point was. What I wanted to clarify
was that this arrangement was NOT a resistor, but it only looks like one
electrically at the motor terminals.