Advertisements
Advertisements
प्रश्न
The primary origin(s) of magnetism lies in ______.
- atomic currents.
- pauli exclusion principle.
- polar nature of molecules.
- intrinsic spin of electron.
विकल्प
a and d
c and d
b and d
b and c
उत्तर
a and d
Explanation:
The primary origin of magnetism lies in the fact that the electrons are revolving and spinning about the nucleus of an atom, and we know that an moving charge carries current along with it. We meant this current here as atomic current and which is responsible to produce an orbital magnetic moment. This atomic current gives rise to magnetism. The revolving and spinning about nucleus of an atom is called intrinsic spin of electron, which gives rise to spin magnetic moment. So, total magnetic moment is the sum of orbital magnetic moment and spin magnetic moment.
APPEARS IN
संबंधित प्रश्न
Why does a compass needle get deflected when brought near a bar magnet?
When a dielectric is placed in an electric field, it gets polarised. The electric field in a polarised material is less than the applied field. When a paramagnetic substance is kept in a magnetic field, the field in the substance is more than the applied field. Explain the reason of this opposite behaviour.
Electromagnets are made of soft iron because soft iron has _______________ .
Pick the correct options.
(a) All electrons have magnetic moment.
(b) All protons have magnetic moment.
(c) All nuclei have magnetic moment.
(d) All atoms have magnetic moment.
The susceptibility of annealed iron at saturation is 5500. Find the permeability of annealed iron at saturation.
An a-particle and a proton of the same kinetic energy are in turn allowed to pass through a magnetic field `vec"B"`, acting normal to the direction of motion of the particles. Calculate the ratio of radii of the circular paths described by them.
The magnetism of a magnet is due to ______
Three identical bar magnets are rivetted together at centre in the same plane as shown in figure. This system is placed at rest in a slowly varying magnetic field. It is found that the system of magnets does not show any motion. The north-south poles of one magnet is shown in the figure. Determine the poles of the remaining two.
