Difference between two stage network and three stage network

Calculate the potential difference between points B and D of the network of resistance shown in figure

Find the effective resistance between points A and B for the network

What is the equivalent resistance between the points A and B of the network?

Find potential difference between points A and B of the network shown in fig. and distribution of given main current through different resistors.

What is the equivalent resistance between the points A and B of the network. .

What is the equivalent resistance between the point A and B of the network ?

Calculate the equivalent resistance between the points a and b of the following network of conductors.