You are given three resistors of 1 ohm each. Show that they can be grouped in four different ways and calculate the combined resistance in each case.

Three resistors, 30Omega each are connected across each arm of a triangle. Calculate the equivalent resistance betweeen any two croners of triangle.

5 cells each of e.m.f 1.5 V and internal resistance 0.1 Omega are connected in such a manner that the current in an external resistor of 10 Omega is maximum. Draw the circuit diagram of the combination and calculate the current in the circuit.

Three capacitors each of capacitance 1muF are connected in parallel. The resultant capacitance of the combination is

What is the effective resistance value of 3 equal resistance 3 Ohm each when grouped in series