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MHT CET20228 Aug 2022Morning ShiftPhysicsAlternating CurrentActual

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

Options

  1. A2.5 A
  2. B0.5 A
  3. C0.25 A
  4. D5 A

Correct answer

C. 0.25 A

Step-by-step solution

Let I be the current flowing through secondary coil. Current on primary (input) coil i=5 ~A Voltage in primary coil V=220 ~V Voltage in secondary coil V^ =2200 ~V Considering only 50 % power is transmitted: aligned & 0.5( Vi )=V^ I & 0.5 220 5=2200 I & I=0.25 ~A aligned

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