Physics-
General
Easy

Question

In the adjoining figure the equivalent resistance between A and B is

  1. 5blank capital omega    
  2. 8blank capital omega    
  3. 2.5blank capital omega    
  4. 6.8blank capital omega    

The correct answer is: 5blank capital omega


    Equivalent circuit of the given circuit is

    Between points C and D resistors 2capital omega, 2capital omega and 2capital omega are in series, therefore, their equivalent resistance,
    R to the power of ´ end exponent equals 2 plus 2 plus 2 equals 6 capital omega
    Resistors R’ and 6capital omega are in parallel, therefore their equivalent resistance is given by
    fraction numerator 1 over denominator R to the power of ´ ´ end exponent end fraction equals fraction numerator 1 over denominator 6 end fraction plus fraction numerator 1 over denominator 6 end fraction
    R to the power of ´ ´ end exponent equals 3 capital omega
    Now between points A and B 1capital omega, 3blank capital omega and 1capital omega are in series.
    Therefore, resultant resistance is
    R=1+3+1=5capital omega

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