Three sources of emf,V_(0) sinwt,V_(0) coswt and V_(0) are connected in series as shown. RMS value of current in the circuit is

A voltage source V=V_(0) sin (100 t) is connected to a black box in which there can be either one element out of L,C,R or any two of them connected in series. At steady state, the variation of current in the circuit and the source voltage are plotted together with time.using an oscilloscope, as shown If AC source is removed, the circuit is shorted for some time so that capacitor is fully discharge and then a battery of constant EMF is connected across the black box, at t=0 .The current in the circuit will-

A 0.21 H inductor and a 12 Omega resistance are connected in series to a 220 V, 50 Hz ac source. The current in the circuit is

A 31.4Omega resistor and 0.1H inductor are connected in series to a 200V, 50Hz ac source. Calculate (i) the current in the circuit

A 0.21 H inductor and a 12 ohm resistance are connected in series to a 220 V . 50 Hz ac source. Calculate the current in the circuit and the phase angle between the current and the source voltage.

Three identical cells, each of emf 2 V and internal resistance 0.2Omega are connected in series to an external resistor of 7.4Omega . Calculate the current in the circuit.

Three batteries are connected as shown in the figure. Then the total emf in the circuit is "____" V.