The value of $$Z$$ in Fig., which is most appropriate to cause parallel resonance at $$500$$ $$Hz$$ is

In a series $$RLC$$ circuit at resonance, the magnitude of the voltage developed across the capacitor

The $$RMS$$ value of half $$-$$ wave rectified symmetrical square wave current of $$2A$$ is

A series $$R-L-C$$ circuit when excited by a $$10$$ $$V$$ sinusoidal voltage source of variable frequency, exhibits resonance at $$100$$ $$Hz$$ and has a $$3$$ $$dB$$ bandwidth of $$5$$ $$Hz.$$ The voltage across the inductor $$L$$ at resonace is