Physics-
General
Easy

Question

In the given potentiometer circuit, the resistance of the potentiometer wire AB is R subscript 0 end subscript. C is a cell of internal resistance r. The galvanometer G does not give zero deflection for any position of the jockey J. Which of the following cannot be a reason for this?

  1. r greater than R subscript 0 end subscript    
  2. R greater than greater than R subscript 0 end subscript    
  3. emf of C > emf of D    
  4. The negative terminal of C is connected to A    

The correct answer is: r greater than R subscript 0 end subscript

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