I have a very basic doubt on these topics.av power taken by these over complete cycle is zero.so does that mean a device made up of only L C wont consume any power.also if c l are there wats the point of using resistance thanpls hlp in detail.
L and C simply store electricity in a magnetic field (L) or electric field (C), only to release that energy later. If L and C are perfect, then you're right, they won't consume power. Practically, though, a real L has some resistance, and a real C has some leakage (conductance, G). If you put DC across an inductor, it will short out, and overheat. If you add a resistor in series, the current will be limited by the resistor, and will not reach too high a current.
