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Which law states that the force between two point charges is directly proportional to the product of the magnitudes of the charges?
Ohm's Law
Coulomb's Law
Faraday's Law
Ampere's Law
Coulomb's Law
Coulomb's Law states that the electrostatic force of attraction or repulsion between two stationary point charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them. This fundamental law is the cornerstone of electrostatics.
Coulomb's Law states that the electrostatic force of attraction or repulsion between two stationary point charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them. This fundamental law is the cornerstone of electrostatics.
Think of magnets or static cling on clothes coming out of a dryer: the closer the charged items are and the stronger their charge, the harder they pull or push against each other.
Remember 'CORRECT': Charges Oppose/Attract: Product of charges on top, Radius squared on the bottom.
F=kтЛЕr2q1тАЛq2тАЛтАЛ тАФ Coulomb's Law formula for electrostatic force
k=4╧А╬╡0тАЛ1тАЛ тАФ Coulomb's constant in a vacuum
When two charged particles are placed near each other, they interact through their surrounding electric fields. The magnitude of this interaction depends directly on how strong the charges are (q1тАЛ and q2тАЛ) and weakens rapidly as the distance (r) between them increases, following an inverse-square relationship.
Force is directly proportional to the product of the magnitudes of the two point charges.
Force is inversely proportional to the square of the distance between the charges (1/r2).
Acts along the straight line joining the two charges.
Provides an exact mathematical framework for calculating forces between static microscopic and macroscopic charges.
Valid only for stationary point charges and fails for charges in high-speed motion where magnetic effects dominate.
Determining atomic structure and the behavior of electrons around nuclei.
Designing electrostatic precipitators and industrial painting systems.
The vacuum permittivity constant ╬╡0тАЛ is approximately 8.854├Ч10тИТ12C2/(NтЛЕm2).
Option A (Ohm's Law) deals with electrical resistance, voltage, and current. Option C (Faraday's Law) governs electromagnetic induction. Option D (Ampere's Law) relates magnetic fields to electric current.
B is correct тАФ Coulomb's Law defines the direct proportionality between the electrostatic force and the product of the magnitudes of two point charges.
Note the structural similarity between Coulomb's Law and Newton's Law of Gravitation: both are inverse-square laws, replacing mass with electric charge.
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