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NTA Abhyas JEE Main2020PhysicsMagnetic Properties of MatterPractice

At a certain place, the angle of dip is 30 ° and the horizontal component of earth's magnetic field is 50   μT . The total magnetic field (in μT ) of the earth at this place, is

Options

  1. A100 3   μT
  2. B100   μT
  3. C100 3   μT
  4. D200   μT

Correct answer

C. 100 3   μT

Step-by-step solution

B = H cos ⁡ δ = 50 cos ⁡ 30 o = 50   × 2 3 = 100 3   μT (H = horizontal component of the earth's magnetic field and B = total magnetic field of earth)

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