A circuit consists of a resistor of 1 ohm in series with a parallel arrangement of resistors of 12 ohm and 6 ohm. Calculate the total resistance of the circuit. Draw a diagram of the arrangement.

Five resistors, each of 3 ohm, are connected as shown in figure. Calculate the resistance (a) between the points P and Q, and (b) between the points X and Y.

Calculate the effective resistance between the points A and B in the network shown below in figure.

In the network shown in figure, calculate the equivalent resistance between the points (a) A and B (b) A and C