Physics-
General
Easy

Question

In Wheat stone’s bridge shown in the adjoining figure galvanometer gives no deflection on pressing the key, the balance condition for the bridge is :

  1. fraction numerator R subscript 1 end subscript over denominator R subscript 2 end subscript end fraction equals fraction numerator C subscript 1 end subscript over denominator C subscript 2 end subscript end fraction    
  2. fraction numerator R subscript 1 end subscript over denominator R subscript 2 end subscript end fraction equals fraction numerator C subscript 2 end subscript over denominator C subscript 1 end subscript end fraction    
  3. fraction numerator R subscript 1 end subscript over denominator R subscript 1 end subscript plus R subscript 2 end subscript end fraction equals fraction numerator C subscript 1 end subscript over denominator C subscript 1 end subscript minus C subscript 2 end subscript end fraction    
  4. fraction numerator R subscript 1 end subscript over denominator R subscript 1 end subscript minus R subscript 2 end subscript end fraction equals fraction numerator C subscript 1 end subscript over denominator C subscript 1 end subscript plus C subscript 2 end subscript end fraction    

The correct answer is: fraction numerator R subscript 1 end subscript over denominator R subscript 1 end subscript plus R subscript 2 end subscript end fraction equals fraction numerator C subscript 1 end subscript over denominator C subscript 1 end subscript minus C subscript 2 end subscript end fraction

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