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NEETPhysicsMagnetic Effects of Current

What is the estimated magnitude of the magnetic field (B) inside a closely wound solenoid 80 cm long with 5 layers of windings, each having 400 turns, and a diameter of 1.8 cm, when it carries a current of 8.0 A?

Options

  1. A1.2 × 10 –2 T
  2. B2.5 × 10 –2 T
  3. C3.6 × 10 –2 T
  4. D4.8 × 10 –2 T

Correct answer

B. 2.5 × 10 –2 T

Step-by-step solution

Correct Option is : (B) 2.5 × 10 –2 T

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