Condensers of capacities 5 F and 10 F are connected in parallel in a circuit with a cell of e.m.f. 2V. What should be the capacity of the condenser to be connected in series with parallel combination of the condensers to get 1 C charge to flow in the circuit ?

Two condensers of capacity 3 mu F and 6 mu F respectively are connected in series . The combination is connected across a potential of 6 V. The ratio of the energies stored by the condensers will be

A parallel plate air condenser has a capacity of 20 mu F . What will be the new capacity if the distance between two plates is doubled ?

A capacitor of 20 muF is connected in series with a 25 Omega resistance to peak e.m.f. 240 V, 50 Hz A.C. Calculate:-the capacitive reactance of the coil

A capacitor of 20 muF is connected in series with a 25 Omega resistance to peak e.m.f. 240 V, 50 Hz A.C. Calculate:-impedance of the circuit

Four condensers are of same capacity. When three of them are connected in parallel and the remaining one is connected in series with this combination the resultant capacity is 3.75 mu F . Find the capacity of each condenser .

In a circuit L,Cand R are connected in series with an alternating voltage of frequency f the current leads the voltage by 45^@. The value of C is

A set of three coils having resistances 10 Omega , 12 Omega and 15 Omega are connected in parallel. This combination is connected in series with series combination of three coils of the same resistances. Calculate the total resistance and current through the circuit, if a battery of emf 4.1 Volt is used for drawing current.

An A.C.source of r.m.s. value85V and frequency 50Hz is connected in series with an inductance of 2H and a resistance of 10 Omega . Find the maximum current in the circuit.

Choose correct alternative. How many cells of emf 1.5 volt and internal resistance 0.5 Omega must be connected in series with 20 Omega resistance to give the current of 0.6A in circuit?