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Concepts Of Physics MCQ Edition [Volume 2]PhysicsPermanent Magnets

A dip circle is positioned at the geomagnetic equator. Its needle is permitted to rotate in a vertical plane perpendicular to the magnetic meridian. The needle will remain

Options

  1. Apurely in the vertical direction
  2. Bin any direction except horizontal and vertical
  3. Cpurely in the horizontal direction
  4. Din whatever direction it is released

Correct answer

D. in whatever direction it is released

Step-by-step solution

At the geomagnetic equator, the angle of dip is zero, which means the vertical component of the Earth's magnetic field is zero ( B_V = 0 ). The horizontal component of the Earth's magnetic field ( B_H ) acts along the magnetic meridian. The dip circle is placed such that its needle rotates in a vertical plane perpendicular to the magnetic meridian. The angle between this plane and the magnetic meridian is = 90^ . The horizontal component of the magnetic field in this plane is B_H' = B_H 90^ = 0 . The vertical compo

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