Physics-
General
Easy

Question

Two cells with emfs epsilon subscript 1 end subscript equals 1.3 V a n d epsilon subscript 2 end subscript equals 1.5 V are connected as shown. The voltmeter reads 1.45 V. If r subscript 1 end subscript and r subscript 2 end subscriptbe the internal resistance of the cells, then the ratio fraction numerator r subscript 1 end subscript over denominator r subscript 2 end subscript end fraction is

  1. 1 : 1    
  2. 3 : 1    
  3. 1: 2    
  4. none    

The correct answer is: 3 : 1

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