PRINCIPLE OF HOMOGENEITY
➨ 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 are those physical quantities which have dimensions and do not have fixed value.
❖ E.g., velocity, acceleration, force, work, power... etc.
➨Dimensionless variables are those physical quantities which do not have dimensions and do not have fixed value.,
❖ E.g., Specific gravity, refractive index, Coefficient of friction, Poisson’s Ratio etc.,
➨ 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
➨ Dimensional variables are those physical quantities which have dimensions and do not have fixed value.
❖ E.g., velocity, acceleration, force, work, power... etc.
Dimensionless Variables
➨Dimensionless variables are those physical quantities which do not have dimensions and do not have fixed value.,
❖ E.g., Specific gravity, refractive index, Coefficient of friction, Poisson’s Ratio etc.,
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Biot-Savart Law
In physics, specifically electromagnetism, the Biot–Savart law (/ˈbiːoʊ səˈvɑːr/ or /ˈbjoʊ səˈvɑːr/) 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 Biot–Savart law is fundamental to magnetostatics. It is valid in the magnetostatic approximation and consistent with both Ampère's circuital law and Gauss's law for magnetism. When magnetostatics does not apply, the Biot–Savart law should be replaced by Jefimenko's equations. The law is named after Jean-Baptiste Biot and Félix Savart, who discovered this relationship in 1820.
In physics, specifically electromagnetism, the Biot–Savart law (/ˈbiːoʊ səˈvɑːr/ or /ˈbjoʊ səˈvɑːr/) 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 Biot–Savart law is fundamental to magnetostatics. It is valid in the magnetostatic approximation and consistent with both Ampère's circuital law and Gauss's law for magnetism. When magnetostatics does not apply, the Biot–Savart law should be replaced by Jefimenko's equations. The law is named after Jean-Baptiste Biot and Félix Savart, who discovered this relationship in 1820.
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