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Classification of magnetic materials:
Diamagnetic substances: Diamagnetic substances ar
Hysteresis: The phenomenon of lagging of magnetic induction behind the magnetizing field is called Hysteresis and called “delayed”.
Gauss’s law in magnetism: It states that the surface integral of a magnetic field over a closed surface is always zero.
Magnetic field of a bar magnet at an axial point:
Magnet:- Those materials which have attractive and directive properties.
Two types of magnet:
Natural magnet: Which occur naturall
According to Bohr model of Hydrogen like atoms, negatively charged electron revolves around the positively charged nucleus. This uniform circular motion of the electron is equ
Coulomb’s law or magnetic force:
It state that the force of attraction or repulsion between two magnetic poles is directly proportional to th
Torque on a magnetic dipole in a magnetic field:
Magnetism:-
It is the property of the magnet by virtue of which attract small pieces of iron, nickel, cobalt etc.
Magnetic lines of force: It may be defined as the curve the tangent to which at any point give the direction of the magnetic field at that point.
Magnetic dipole:
An arrangement of two equal and opposite magnetic poles separated by a small distance is called a magnetic dipole.
Ever
Current loop as a magnetic dipole:
We know that the magnetic field produced at a larger distance r from the centre of a circular loop along its axi
The work done in turning the dipole through a small angle dθ is
dW = τ dθ = MB sinθ dθ
If the dipole is rotated from initial
General Physiochemical Properties:-
The general physiochemical properties of 1st row transition elements are discussed as follows:
Magnetic force on a moving charge: the electric charges moving in a magnetic field experiences a force F such that
(i) The force is proportional to
Cyclotron: It is a device used to accelerate charged particles like protons, deuterons, α particles, etc. to very high energies.
Prin
Biot-Savart law: According to Biot-Savart law, the magnitude of the field dB is
Directly proportional to the current I through the conductor. i.
Magnetic field due to a long straight current carrying conductor: As shown in fig. consider straight conductor XY carrying current I. We wish to find its magn
Moving coil Galvanometer: A galvanometer is a device used to detect current in a circuit.
Principle: If a current carrying coil placed in a magnetic field experiences a torque, the magnitude of which depends on the strength of current.
Ampere’s Circuital law: The line integral of the magnetic field around any closed circuit is equal to the µ0 times the total current l threading or passing through the closed circuit.
Mathematically,
Dimensions of a Physical Quantity.
The powers to which fundamental quantities must be raised in order to express the given physical quantity are called its dimensions.
To make it more clear, consider the physical quantity force
Torque on current loop in a uniform magnetic field:
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