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General
Easy

Question

In a metre bridge, the gaps are closed by two resistances P and Q the balance point is obtained at 40 cm. When Q is shunted by a resistance of 10capital omega, the balance point shifts to 50 cm. The values of P and Q are

  1. fraction numerator 10 over denominator 3 end fraction capital omega comma 5 capital omega    
  2. 20 capital omega comma 30 capital omega    
  3. 10 capital omega comma 15 capital omega    
  4. 5 capital omega comma fraction numerator 15 over denominator 2 end fraction capital omega    

The correct answer is: fraction numerator 10 over denominator 3 end fraction capital omega comma 5 capital omega

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