In the network shown in figure each resistance is 1 
. The effective resistance between 
and 
is
Text Solution
Verified by ExpertsThe correct answer is:
D
By symmetry, currents 
and 
from A is the same as 
and 
reaching B.
As the same current is flowing from A to O and O to B, O can be treated as detached from AB. Now CO and OD will be in series hence its total resistance 
It is in parallel with 
so equivalent resistance
This equivalent resistance is in series with 
and 
. So total resistance 
Now 
is parallel to 
that is 2 
. So total resistance
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