Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Electric Field Due to System of Charges: Let we consider n point charges q₁, q₂, q₃,…… qₙ with position vector r₁, r₂, r₃……rₙ exert forces F₁, F₂, F₃,…..Fₙ on test charge q₀ placed at origin O. If E is electric field at point P due to […]
Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Electric Field Due to a Point Charge: Let a point charge q is placed at the origin O. We wish to determine it’s electric field at a point P, such that op=r. Now if we placed a test charge q₀ at point P, then according to coulomb’s
Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Electric Field: The electric field due to a charge q at a point in space may be defined as the force that a unit positive charge would experience if place at that point. Electric Field Intensity: The electric field intensity at any point due to source
Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Electrostatic Force Due to Continuous Charge Distribution: The reason in which charges are closely spaced is said to be have continuous charge distribution of charge. Continuous charge distribution is of three types. 1. Linear Charge Distribution: If a charge distribution is distributed along one dimensional curve
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Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Forces Between Multiple of Charges:(Superposition Principle):- It state that when a number of charges are interacting, the total force on a given charge is the vector sum of the forces exerted on it due to all other charges. The force between two charges is not affected by
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Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Absolute Permittivity of Medium: (Dielectric Constant):- The force between two charges q₁ and q₂ located at a distance r apart in a medium may be written as-
Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Comparison of Coulomb’s law with Gravitational law: Both the Coulomb’s and Newton’s Law follow Inverse Square Law. Electric force can be attractive or repulsive, But gravitational force is always attractive in nature.
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Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Coulomb’s Law in Vector Form: We consider two positive charges q₁ and q₂ are placed in vacuum at a distance r from each other. They repel to each other. According to Coulomb’s law the magnitude of force on charge q₁ due to q₂ is given by
Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Coulomb’s Law: Coulomb’s law states that the force of attraction or repulsion between two stationary point charges is (I) Directly proportional to the product of the magnitudes of the two charges and (II) Inversely proportional to the square of the distances between them. This force acts along
Chapter-1|Electric Charges and Fields | NCERT 12th Physics: Basic properties of electric charge:- From the experimental observation the electric charge has following three basic properties. 1.Additive nature of electric charge:- Electric charge is additive in nature, that means the total charge of the system is the algebraic sum of all the individual charges located at different
