Physics-
General
Easy

Question

Two cells of emfs E1 and E2 are connected in series in a circuit Let r1 and r2 be the internal resistance of the cells Find the current through the circuit

  1. fraction numerator E subscript 1 end subscript plus E subscript 2 end subscript over denominator r subscript 1 end subscript plus r subscript 2 end subscript end fraction    
  2. fraction numerator E subscript 1 end subscript over denominator r subscript 1 end subscript plus r subscript 2 end subscript end fraction    
  3. fraction numerator E subscript 2 end subscript over denominator r subscript 1 end subscript plus r subscript 2 end subscript end fraction    
  4. open parentheses E subscript 1 end subscript plus E subscript 2 end subscript close parentheses open parentheses r subscript 1 end subscript plus r subscript 2 end subscript close parentheses    

The correct answer is: fraction numerator E subscript 1 end subscript plus E subscript 2 end subscript over denominator r subscript 1 end subscript plus r subscript 2 end subscript end fraction

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