Coulomb´s law

Front

What is Coulomb's Law?

Back

Coulomb's Law describes the electrostatic force between two charged objects, stating that the force is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

Front

What is the formula for Coulomb's Law?

Back

F = k * |q1 * q2| / r^2, where F is the force between the charges, k is Coulomb's constant (8.99 x 10^9 N m²/C²), q1 and q2 are the magnitudes of the charges, and r is the distance between the charges.

Front

What does a positive value of electrostatic force (F_e) indicate?

Back

A positive value of F_e indicates that the charges are repelling each other.

Front

What does a negative value of electrostatic force (F_e) indicate?

Back

A negative value of F_e indicates that the charges are attracting each other.

Front

How does the distance between two charges affect the electrostatic force?

Back

As the distance between two charges increases, the electrostatic force decreases; this relationship is inversely proportional.

Front

What is the unit of charge in the International System of Units (SI)?

Back

The unit of charge in the SI system is the Coulomb (C).

Front

How many excess electrons are in a charge of 1 Coulomb?

Back

There are approximately 6.242 x 10^18 excess electrons in a charge of 1 Coulomb.

Front

If two charges are doubled, how does the electrostatic force change?

Back

If both charges are doubled, the electrostatic force increases by a factor of four, since force is proportional to the product of the charges.

Front

What happens to the electrostatic force if the distance is halved?

Back

If the distance between two charges is halved, the electrostatic force increases by a factor of four, since force is inversely proportional to the square of the distance.

Front

What is Coulomb's constant (k)?

Back

Coulomb's constant (k) is approximately 8.99 x 10^9 N m²/C² and is used in Coulomb's Law to calculate the force between two charges.