A+2.0 nC point charge is 3.0 cm away from a -3.0 nC point charge. (a) What are the magnitude and

step 1 Well, according to Coulomb's law, force exerted by Q1 on Q2 is given by F12, and it's equal to K

A+2.0 nC point charge is 3.0 cm away from a -3.0 nC point...

$\mathrm{A}+2.0 \mathrm{nC}$ point charge is $3.0 \mathrm{cm}$ away from a $-3.0 \mathrm{nC}$ point charge. (a) What are the magnitude and direction of the electric force acting on the $+2.0 \mathrm{nC}$ charge? (b) What are the magnitude and direction of the electric force acting on the $-3.0 \mathrm{nC}$ charge?

$\mathrm{A}+2.0 \mathrm{nC}$ point charge is $3.0 \mathrm{cm}$ away from a $-3.0 \mathrm{nC}$ point charge. (a) What are the magnitude and direction of the electric force acting on the $+2.0 \mathrm{nC}$ charge?
(b) What are the magnitude and direction of the electric force acting on the $-3.0 \mathrm{nC}$ charge?

Key Concepts

Coulomb's Law

Coulomb's Law is a fundamental principle in electromagnetism that describes the force between two point charges. It states that the magnitude of the electric force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them. The force is given by F = k(|q1 * q2|)/r², where k is Coulomb's constant. This law is essential for calculating the force magnitude in any electrostatic interaction.

Charge Interaction and Force Direction

The interaction between two point charges depends on the sign of the charges involved. Like charges repel each other while opposite charges attract. In problems involving electric forces, determining whether the force is attractive or repulsive is crucial as it dictates the direction of the force vector. This concept helps in deciding which direction the force will act based on the specific configuration of the charges.

Newton's Third Law in Electrostatics

Newton's Third Law states that for every action, there is an equal and opposite reaction. In the context of electrostatics, this means that the force exerted by one charged particle on another is equal in magnitude and opposite in direction to the force exerted back on the first charge. This principle is critical when analyzing forces in a system involving multiple charges, ensuring that the forces are balanced and consistent with physical laws.

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