COULOMBS LAW OF ELECTRIC FORCE

 COULOMBS LAW OF ELECTRIC FORCE 

Coulomb's Law of Electric Force:


1. Like charges repel: Positive repels positive, negative repels negative.

2. Opposite charges attract: Positive attracts negative.

3. Force depends on charge: More charge = stronger force.

4. Force depends on distance: Closer = stronger force, farther = weaker force.


Formula: F = k * (q1 * q2) / r²


Where:

F = Electric force

k = Constant

q1, q2 = Charges

r = Distance between charges


The derivation of Coulomb's Law involves:


Assumptions

1. Two point charges (q1 and q2)

2. Charges are stationary

3. Distance between charges is r


Steps

1. Experimental observations: Coulomb's Law is based on experimental results, showing force proportionality to charge product and inverse proportionality to distance squared.

2. Mathematical formulation: F ∝ (q1 × q2) / r²

3. Introduction of constant: F = k * (q1 × q2) / r²


Key points

1. Coulomb's constant (k): depends on medium and units

2. Vector nature: Force is a vector quantity

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