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COMEDK2018PhysicsAlternating Current

A current of 5 ~A is flowing at 220 ~V in the primary coil of a transformer. If the voltage produced in the secondary coil is 2200 ~V and 50 % of power is lost, then the current in the secondary will be

Options

  1. A2.5 ~A
  2. B5 ~A
  3. C0.25 ~A
  4. D0.5 ~A

Correct answer

C. 0.25 ~A

Step-by-step solution

For a transformer, aligned I_ P =5 ~A , V_ P &=220 ~V V_ S =2200 ~V aligned Since, 50 % power is lost, hence power at secondary side, array cl & P₀=50 % of P_ i = 50 100 1100 & P₀=550 ~W & V_ S I_ S =550 & 2200 I_ S =550 & I_ S = 550 2200 = 1 4 =0.25 ~A array

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