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NEET2023PhysicsAlternating CurrentActual

A 12   V ,   60   W lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of 220   V . Assuming the transformer to be ideal, what is the current in the primary winding?

Options

  1. A0 . 37   A
  2. B0 . 27   A
  3. C2 . 7   A
  4. D3 . 7   A

Correct answer

B. 0 . 27   A

Step-by-step solution

For an ideal transformer, P o w e r i n p u t = P o w e r o u t p u t ⇒ V P I P = P o w e r o u t p u t ⇒ I P = 60 220 ≈ 0 . 27   A

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