Isogonic lines on magnetic map will have
Zero angle of dip
Zero angle of declination
Same angle of declination
Same angle of dip
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 $4 \pi \times 10^{-7} \,N/A{ }^2$ )
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