Physics-
General
Easy
Question
In the figure, the value of resistors to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is
- R
- 3 R
The correct answer is:
Cut the series from XY and let the resistance towards right of XY be 
whose value should be such that when connected across AB does not change the entire resistance. The combination is reduced to as shown below.
The resistance across 
Thus 
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