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MHT CET202122 Sep 2021Evening ShiftPhysicsAlternating CurrentActual

A step down transformer is used to reduce the main supply from ' V₁ ' volt to ' V₂ ' volt. The primary coil draws a current ' I₁ ' A and the secondary coil draws ' I₂ ' A. (I₁ < I₂ ) . The ratio of input power to output power is

Options

  1. AV ₁ ~V ₂ I ₁ I ₂
  2. BI ₁ ~V ₁ I ₂ ~V ₂
  3. CI ₁ I ₂ ~V ₁ ~V ₂
  4. DV ₁ I ₂ ~V ₂ I ₁

Correct answer

B. I ₁ ~V ₁ I ₂ ~V ₂

Step-by-step solution

aligned & Input power = I ₁ ~V ₁ & Output power = I ₂ ~V ₂ aligned

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