~~Resistor Concept~~ Hi. I am having trouble with understanding the resistor. What does a resistor do in SERIES or in PARALLEL circuit? My understanding: ( plz correct me if i am wrong!) In series circuit, Resistor is a device that reduce the current in the circuit. And according to ohm's law, V = IR, when the current is reduced, the voltage will also be reduced. So I think resistor will reduce BOTH voltage and current. And if the voltage doesn't change, then what is the point of connect a voltmeter across a resistor, Right? So I think BOTH voltage and current are reduced by a resistor. Here comes another problem. If a resistor in series would reduce current and/or voltage, will the current BEFORE passing thru the resistor be larger than the current AFTER passing thru the resistor ? Or the current will only change at the point where the resistor is put? Example: Compare How will the brightness of 2 lightbulb change if i put a resistor bewteen 2 identical lightbulbs? How will the brightness of 2 lightbulb change if i put a resistor NEXT TO 2 identical lightbulbs? ( NOT BEWTEEN ) Thx for helping P.S. Lightbulb similar to this one below.