Obtain an expression for impedance of resistor, pure inductor and capacitor connected in series across alternating e.m.f. State formula for phase difference.

An a.c. consists of a resistor of 10W, inductor of 0.1 H and capacitor of 50 mF in series across a 50 V, 50 Hz supply. Determine power factor of the circuit.

A capacitance of 0.4 muF is connected to an alternating e.m.f. of frequency 100 Hz. What is the capacitive reactance ?

Two cells with the same emf E and different internal resistances r_(1) and r_(2) are connected in series to an external resistances R . The value of R so that the potential difference across the first cell be zero is

A 25 muF capacitor, 0.1 H inductor and 25W resistor are connected in series with an ac source of emf e = 310 sin 314 t volt. What is :-impedance

An a.c. circuit consists of a resistor of 10 Omega , inductor of 0.1 H and capacitor of 50 mu F in series across a 100 V, 50 Hz supply. Determine current in the circuit .

Choose correct alternative. Two resistance of 3 Omega and 2 Omega are connected in series to a cell of emf 3 volt and internal resistance of 1 Omega . The potential difference across 3 Omega resistance will be A. 1 volt B. 0.5 volt C. 1.5 volt D. 2 volt

A circuit consists of two cells, each of e.m.f. E and internal resistances r_(1) and r_(2) are connected in series through an external resistance X. If the potential difference between the ends of the first cell is zero, the value of X in terms of r_(1) and r_(2) will be

A 25 muF capacitor, 0.1 H inductor and 25W resistor are connected in series with an ac source of emf e = 310 sin 314 t volt. What is:-current in the circuit

A potentiometer wire is 100 cm long hand a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obatined at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emfs is:

In a series LCR circuit, voltages across an inductor,a capacitor and a resistor are 30 V,30 V and 60 V respectively. What is the phase difference between applied voltage and current in the circuit ?