Isogonic lines on magnetic map will have

  • A

    Zero angle of dip

  • B

    Zero angle of declination

  • C

    Same angle of declination

  • D

    Same angle of dip

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The angle between the earth's magnetic and the earth's geographical axes is....$^o$

A long vertical wire carries a steady current of $5.0 \,A$. Asensitive magnetic compass is placed in a plane perpendicular to the wire and $10.0$ $cm$ south of it. It registers a deflection $60^{\circ}$ north of east. The magnitude of the horizontal component of the earth's magnetic field is (permeability of free space is $4 \pi \times 10^{-7} \,N/A{ }^2$ )

  • [KVPY 2021]

Which of the following relation is correct in magnetism

Intensity of magnetic field due to earth at a point inside a hollow steel box is

Which is incorrect