Isogonic lines on magnetic map will have
Zero angle of dip
Zero angle of declination
Same angle of declination
Same angle of dip
Two bar magnets oscillate in a horizontal plane in earth's magnetic field with time periods of $3\,s$ and $4\,s$ respectively. If their moments of inertia are in the ratio of $3: 2$ then the ratio of their magnetic moments will e.
Assertion : The true geographic north direction is found by using a compass needle.
Reason : The magnetic meridian of the earth is along the axis of rotation of the earth.
Planets producing larger magnetic field have larger
The total intensity of earth's magnetic field at the magnetic equator is $5$ $units$. Its value at a magnetic latitude of $37^o $ is equal to
If magnetic lines of force are drawn by keeping magnet vertical, then number of neutral points will be