I am a complete newbie to electronics. I am still learning the basics.I wanted to know how a current limiting resistor worked.If we add a current limiting resistor in series with a circuit then the current flowing through the resistor as well as the circuit connected after the resistor has to be same since they are connected in series.So how is the resistor limiting any current.Also there is going to be a potential drop across the resistor then the and hence the circuit will have lower voltage across it.However the same resistor connected in parallel makes more sense because it is going to divide the current and hence limit the current to the circuit and there wont be any potential drop too.

I know i am going wrong some where.Please help me out.

Thanks