Physics-
General
Easy

Question

A step up transformer connected to a 220 blank V blank A C line is to supply 22 blank k V a neon sign in secondary circuit. In primary circuit a fuse wire is connected which is to blow when the current in the secondary circuit exceeds 10 blank m A. The turn ratio of the transformer is

  1. 50  
  2. 100  
  3. 150  
  4. 200  

The correct answer is: 100


    fraction numerator N subscript s end subscript over denominator N subscript p end subscript end fraction equals fraction numerator V subscript s end subscript over denominator V subscript p end subscript end fraction equals fraction numerator 22000 over denominator 220 end fraction equals 100

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