Coulomb's Law & Electric Potential

These flashcards cover key concepts related to Coulomb's Law and Electric Potential from the physics notes.

What does Coulomb's Law state about the electrostatic force between two point charges?

The magnitude of the electrostatic force is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

What is the formula for Coulomb's Law?

F = ke * (|q1*q2|) / r², where F is the force, ke is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.

What is Coulomb's constant (ke)?

Coulomb's constant is 8.99 × 10⁹ Nm²/C².

What is the nature of the force between two opposite charges according to Coulomb's Law?

The force is attractive.

What is the nature of the force between two like charges according to Coulomb's Law?

The force is repulsive.

Provide a real-life example of electrostatic forces.

Rubbing a balloon on your hair causes your hair to stand up due to electrostatic forces.

What is electric potential (V)?

The amount of electric potential energy per unit charge at a point in an electric field.

What is the formula for electric potential?

V = U/q, where V is electric potential, U is electric potential energy, and q is charge.

What is the electric potential at a distance of r from a point charge?

V = ke * q / r.

How do batteries relate to electric potential?

The voltage on a battery represents the electric potential difference it provides.

What electric potential can electric eels generate?

Electric eels can generate electric potentials of up to 600V.

Using Coulomb's Law, what is the attractive force between charges of +3 × 10-6 C and -2 × 10-6 C placed 0.05 m apart?

The force is 21.6 N attractive.

What is the electric potential at a distance of 0.2 m from a +5 × 10-6 C point charge?

The electric potential is 224,750 V.