Effective Resistance using Symmetry arguments #!#Examples on How to calculate Equivalent resistance

Find equivalent resistance ?

Find equivalent Resistance

Find equivalent Resistance

Calculate equivalent resistance between A and C

Idnetical resistor each of resistance r are connected as shown in figure. Calculate equivalent resistance between A and E.

Calculate the equivalent resistance between A and B

The resistance of each side of an equilateral triangle is 6 ohm. Calculate the equivalent resistance between ends of a side.

What is the ratio of equivalent resistance of series combination of n equal resistance to the equivalent resistance in parallel combination of these n resistances ?