A long solenoid is formed by winding 20 turns/cm. The current necessary to produce a…

Physics · JEE Main · NTA ExamsMagnetic Effects of Current and Magnetism

A long solenoid is formed by winding 20 turns/cm. The current necessary to produce a magnetic field of 20 milli tesla inside the solenoid will be aproximately
  1. 1.0 A
  2. 2.0 A
  3. 4.0 A
  4. 8.0 A

Answer

(D) 8.0 A

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