text: as resistance resist current flow,then what are the functions of inductor..plz answer clearly?   simple! just as a resistor 'resists' current, an inductor 'inducts' current!!  i mean an inductor induces current. this induction happens when a magnetic flux (magnetic field) is applied around the conductor.   there are many theorems related to inductance ... do a google, or refer your textbooks. also do check out these cool links on induction:   http://www.cco.caltech.edu/~phys1/java/phys1/inductance/inductance.html http://en.wikipedia.org/wiki/inductance