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Question 20220
JEE Physics · Medium

Magnetism: Toroid vs Solenoid MCQ

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Toroid vs SolenoidMediumQuestion 20220

Question

Unlike a solenoid, a toroid has no magnetic field:
  1. A
    Inside the core
  2. B
    Outside the toroid (exterior region)
    Correct
  3. C
    In the winding material
  4. D
    Near the centre of each turn

Correct answer

Outside the toroid (exterior region)

Explanation

By Ampere's law, the total enclosed current for a path outside a toroid is zero (equal positive and negative contributions cancel) → B = 0 outside. This is the key advantage — no external field leakage.

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