Physics-
General
Easy

Question

The number of turns in primary and secondary coils of a transformer is 50 and 200 respectively. If the current in the secondary coil is 4A, then the current in the secondary coil is

  1. 1A  
  2. 2 A  
  3. 4 A  
  4. 5 A  

The correct answer is: 1A


    In a transformer
    therefore fraction numerator N subscript P end subscript over denominator N subscript S end subscript end fraction equals fraction numerator I subscript S end subscript over denominator I subscript P end subscript end fraction
    fraction numerator 50 over denominator 200 end fraction equals fraction numerator I subscript S end subscript over denominator 4 end fraction
    rightwards double arrow I subscript s end subscript equals 1 A

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