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NTA Abhyas JEE Main2020PhysicsMagnetic Effects of CurrentPractice

Three rings, each having equal radius R , are placed mutually perpendicular to each other and each having its centre at the origin of co-ordinate system. If current I is flowing through each ring, then the magnitude of the magnetic field at the common centre is

Options

  1. A3 μ 0 I 2 R
  2. Bzero
  3. C2 - 1 μ 0 I 2 R
  4. D3 - 2 μ 0 I 2 R

Correct answer

A. 3 μ 0 I 2 R

Step-by-step solution

B → = B x i ^ + B y j ^ + B z k ^ ⇒ B = B x 2 + B y 2 + B z 2 Since B x = B y = B z so B = 3 B 0 B = 3 μ 0 I 2 R

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