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NEET2011PhysicsAlternating CurrentActual

A coil has resistance 30 and inductive reactance 20 at 50 ~Hz frequency. If an AC source of 200 ~V , 100 ~Hz , is connected across the coil, the current in the coil will be

Options

  1. A4.0 ~A
  2. B8.0 ~A
  3. C20 13 ~A
  4. D2.0 ~A

Correct answer

A. 4.0 ~A

Step-by-step solution

If =50 2 then L=20 Similarly ^ =100 2 then ^ L=40 aligned i & = 200 Z = 200 R^2+ ( ^ L )^2 & = 200 (30)^2+(40)^2 =4 ~A aligned

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