Physics-
General
Easy

Question

In the given network capacitance, C subscript 1 end subscript equals 10 mu F comma C subscript 2 end subscript equals 5 mu F and C subscript 3 end subscript equals 4 mu F. What is the resultant capacitance between A and

  1. 2.2mu F    
  2. 3.2mu F    
  3. 1.2mu F    
  4. 4.7mu F    

The correct answer is: 3.2mu F



    C equals fraction numerator left parenthesis C subscript 1 end subscript plus C subscript 2 end subscript right parenthesis cross times C subscript 3 end subscript over denominator left parenthesis C subscript 1 end subscript plus C subscript 2 end subscript right parenthesis plus C subscript 3 end subscript end fraction equals fraction numerator left parenthesis 5 plus 10 right parenthesis cross times 4 over denominator 5 plus 10 plus 4 end fraction equals fraction numerator 60 over denominator 19 end fraction equals 3.2 mu F

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