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NEET2021PhysicsAlternating CurrentActual

A step down transformer connected to an ac mains supply of 220   V is made to operate at 11   V ,   44   W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?

Options

  1. A2   A
  2. B0 . 4   A
  3. C0 . 2   A
  4. D4   A

Correct answer

C. 0 . 2   A

Step-by-step solution

Power loss is zero. Hence, output Power is equal to input Power. So, Input Power, P 1 = 44   W ⇒ V 1 i 1 = P 1 ⇒ i 1 = P 1 V 1 = 44 220 = 0 . 2   A

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