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MHT CET Medical202626 April 2026Morning ShiftPhysicsAlternating CurrentActual

A step down transformer connected to an a.c. mains of 220 V is made to operate at 5.5 V, 44 W lamp. The current in the primary circuit is (Ignore power losses)

Options

  1. A0.22 A
  2. B0.4 A
  3. C0.2 A
  4. D0.25 A

Correct answer

C. 0.2 A

Step-by-step solution

Given V_p = 220 V, V_s = 5.5 V, and output power P_s = 44 W. For an ideal transformer, the input power is equal to the output power. P_p = P_s V_p I_p = P_s 220 I_p = 44 I_p = 44 220 = 0.2 A Answer: 0.2 A

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