Physics-
General
Easy

Question

In a transformer, the number of turns in primary coil and secondary coil are 5 and 4 respectively. If 240 V is applied on the primary coil, then the ratio of current in primary and secondary coil is

  1. 4 : 5    
  2. 5 : 4    
  3. 5 : 9    
  4. 9 : 5    

The correct answer is: 4 : 5


    fraction numerator N subscript s end subscript over denominator N subscript p end subscript end fraction equals fraction numerator i subscript p end subscript over denominator i subscript s end subscript end fraction rightwards double arrow fraction numerator i subscript p end subscript over denominator i subscript s end subscript end fraction equals fraction numerator 4 over denominator 5 end fraction

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