βπππππ'π€ βπ¦πππ₯π¦π ππππ π£πͺ
--------------------------------------
β Substances that absorb or emit light discontinuously in the form of small packets or bundles.
β The smallest packet of energy is called quantum (plural quanta).
β The radiation is propagated in the form of waves.
β The energy of a quantum is directly proportional to the frequency of the radiation
E β v
E = hv
E = (hc)/ Ξ» =hc v
Where E = Energy of radiation
h = Planck's constant
= 6.626 * 10^-27 * erg .sec
= 6.626 * 10^-34 Joule.sec
β A body that can absorb or emit energy in whole number multiple of quantum.
E = nhv
Where n = 1, 2, 3, 4
β The frequency of emitted radiation goes from lower to higher as the temperature increases.
--------------------------------------
β Substances that absorb or emit light discontinuously in the form of small packets or bundles.
β The smallest packet of energy is called quantum (plural quanta).
β The radiation is propagated in the form of waves.
β The energy of a quantum is directly proportional to the frequency of the radiation
E β v
E = hv
E = (hc)/ Ξ» =hc v
Where E = Energy of radiation
h = Planck's constant
= 6.626 * 10^-27 * erg .sec
= 6.626 * 10^-34 Joule.sec
β A body that can absorb or emit energy in whole number multiple of quantum.
E = nhv
Where n = 1, 2, 3, 4
β The frequency of emitted radiation goes from lower to higher as the temperature increases.
π8β€6π₯3
KEY NOTE
β Electric field at every point is normal to the equipotential
surface passing through that point.
β No work is required to move a test charge on unequipotential
surface.
β The electric force is conservative in nature.
β Coulomb force is central.
β In general, any non-conducting material can be called as a dielectric but broadly non-conducting material having non-polar molecules are referred to as dielectric.
β Electric field at every point is normal to the equipotential
surface passing through that point.
β No work is required to move a test charge on unequipotential
surface.
β The electric force is conservative in nature.
β Coulomb force is central.
β In general, any non-conducting material can be called as a dielectric but broadly non-conducting material having non-polar molecules are referred to as dielectric.
π7β€4
PRINCIPLE OF HOMOGENEITY
β¨ The magnitude of a physical quantity may be added or subtracted from each other only if they have the same dimension, also the dimension on both sides of an equation must be same.This is called as principle of homogeneity.
β¨ Dimensional variables are those physical quantities which have dimensions and do not have fixed value.
β E.g., velocity, acceleration, force, work, power... etc.
β¨Dimensionless variables are those physical quantities which do not have dimensions and do not have fixed value.,
β E.g., Specific gravity, refractive index, Coefficient of friction, Poissonβs Ratio etc.,
β¨ The magnitude of a physical quantity may be added or subtracted from each other only if they have the same dimension, also the dimension on both sides of an equation must be same.This is called as principle of homogeneity.
Dimensional Variables
β¨ Dimensional variables are those physical quantities which have dimensions and do not have fixed value.
β E.g., velocity, acceleration, force, work, power... etc.
Dimensionless Variables
β¨Dimensionless variables are those physical quantities which do not have dimensions and do not have fixed value.,
β E.g., Specific gravity, refractive index, Coefficient of friction, Poissonβs Ratio etc.,
π22β€9π₯2
ββBiot-Savart Law
In physics, specifically electromagnetism, the BiotβSavart law (/ΛbiΛoΚ sΙΛvΙΛr/ or /ΛbjoΚ sΙΛvΙΛr/) is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current.
The BiotβSavart law is fundamental to magnetostatics. It is valid in the magnetostatic approximation and consistent with both AmpΓ¨re's circuital law and Gauss's law for magnetism. When magnetostatics does not apply, the BiotβSavart law should be replaced by Jefimenko's equations. The law is named after Jean-Baptiste Biot and FΓ©lix Savart, who discovered this relationship in 1820.
In physics, specifically electromagnetism, the BiotβSavart law (/ΛbiΛoΚ sΙΛvΙΛr/ or /ΛbjoΚ sΙΛvΙΛr/) is an equation describing the magnetic field generated by a constant electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the electric current.
The BiotβSavart law is fundamental to magnetostatics. It is valid in the magnetostatic approximation and consistent with both AmpΓ¨re's circuital law and Gauss's law for magnetism. When magnetostatics does not apply, the BiotβSavart law should be replaced by Jefimenko's equations. The law is named after Jean-Baptiste Biot and FΓ©lix Savart, who discovered this relationship in 1820.
π10β€7π₯5π2π₯°1