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Question

Six resistors each of resistance R are connected as shown in figure. What is the effective resistance between points A and B? 


  1. R  
  2. 6R
  3. 3R 


Solution

The correct option is B

Resistance R,(R+R)= 2R, (R+R)=2R and R are in parallel 
Hence effective resistance is given by
1Reff=1R+12R+12R+1R
which gives Reff=R3

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