Find the total resistance and current in the circuit.

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.

Find the total resistance in the circuit.

An a.c. e.m.f. of peak value 240 V and frequency 50 Hz is connected to a circuit with R = 12 Omega , L = 2.5 H and a capacitor all in series. Find the capacitance for the current in the circuit to be maximum. Find the maximum current.

A battery of emf 12 V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.5 A, Calculate resistance of resistor.

A battery of emf 12 V and internal resistance 3 Omega is connected to a resistor. If the current in the circuit is 0.6 A, Calculate terminal voltage of the battery when the circuit is closed.

Find the total current in the circuit when the key K_(2) is (i) open (ii) closed.

Answer the following. If the resistors 30 Omega , 40 Omega and 60 Omega are connected in parallel to a battery of 15 V. then find the effective resistance of circuit, the total current and current in each resistor .