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JEE Main202427 Jan 2024Evening ShiftPhysicsAlternating CurrentActual

The primary side of a transformer is connected to 230 V , 50 Hz supply. The turn ratio of primary to secondary winding is 10 : 1 . Load resistance connected to the secondary side is 46 Ω . The power consumed in it is:

Options

  1. A12 . 5 W
  2. B10 . 0 W
  3. C11 . 5 W
  4. D12 . 0 W

Correct answer

C. 11 . 5 W

Step-by-step solution

The voltages associated with the primary and the secondary side of the transformer are related to the turn ratio as follows: V 1 V 2 = N 1 N 2 . . . 1 From equation (1), it follows that 230 V 2 = 10 1 V 2 = 23 V Hence, the power consumed can be calculated as follows P = V 2 2 R = 23 × 23 46 = 11 . 5 W

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