Electric Charge & Coulomb's law

Front

What is electric charge?

Back

Electric charge is a property of subatomic particles that causes them to experience a force when placed in an electromagnetic field. It can be positive or negative.

Front

What is Coulomb's law?

Back

Coulomb's law describes the electrostatic force between two charged objects. It states 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, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between the charges.

Front

What is the SI unit of electric charge?

Back

Coulomb (C) is the SI unit of electric charge.

Front

What happens to the electrostatic force if the distance between two charges is doubled?

Back

The electrostatic force decreases by a factor of four, as it is inversely proportional to the square of the distance.

Front

What type of force exists between two protons?

Back

A repulsive force exists between two protons due to their like charges.

Front

What does a net charge of +2e indicate about an object?

Back

It indicates that the object has lost two electrons.

Front

What is the relationship between charge and force in electrostatics?

Back

The electrostatic force is directly proportional to the product of the magnitudes of the charges involved.

Front

If two charges exert a force of -2.59 x 10^8 N on each other, what does the negative sign indicate?

Back

The negative sign indicates that the force is attractive if the charges are of opposite signs and repulsive if they are of the same sign.

Front

What is the effect of adding more charge to an object?

Back

Adding more charge to an object increases its electric field and the electrostatic force it can exert on other charges.