The ultimate individual unit of magnetism in any magnet is called
North pole
South pole
Dipole
Quadrupole
(c)Monopole do not exists.
A magnetic needle of negligible breadth and thickness compared to its length, oscillates in a horizontal plane with a period $T$. The period of oscillation of each part obtained on breaking the magnet into $n$ equal parts perpendicular to the length is
The $ S.I.$ unit of magnetic permeability is
Magnetic lines of force due to a bar magnet do not intersect because
Below figures $(1)$ and $(2)$ represent lines of force. Which is correct statement
A long magnetic needle of length $2\,L$, magnetic moment $ M$ and pole strength $m$ units is broken into two pieces at the middle. The magnetic moment and pole strength of each piece will be
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