Conductors in Electrostatic Equilibrium Quiz

What is the primary focus of the lesson on conductors in electrostatic equilibrium?

• Understanding the movement of protons in conductors

• Explaining the four rules governing conductors in electrostatic equilibrium

• Discussing the properties of insulators

• Analyzing the behavior of semiconductors

Why is the electric field zero inside an isolated conductor?

• Because protons are free to move

• Because electrons are trapped in the nucleus

• Because mobile charges would move if there was an electric field

• Because the conductor is grounded

Where do excess charges reside in a conductor at electrostatic equilibrium?

• On the surface of the conductor

• In the center of the conductor

• Inside the conductor

• In the nucleus of atoms

What is the orientation of electric field lines relative to the surface of a conductor?

• Randomly oriented

• At a 45-degree angle to the surface

• Perpendicular to the surface

• Parallel to the surface

Why must electric field lines be perpendicular to the surface of a conductor?

• To allow protons to move freely

• To maintain a constant electric field inside the conductor

• To prevent any component of the electric field from being parallel to the surface

• To ensure electrons move along the surface

What happens to charge density at sharp points on an irregularly shaped conductor?

• Charge density is unaffected by shape

• Charge density increases

• Charge density remains constant

• Charge density decreases

In the example problem, what is the charge on the inner surface of the hollow sphere?

• Negative 7.0 nanocoulombs

• Positive 4.0 nanocoulombs

• Negative 4.0 nanocoulombs

• Positive 7.0 nanocoulombs

What is the total charge on the outer surface of the hollow sphere in the example problem?

• Positive 11.0 nanocoulombs

• Positive 4.0 nanocoulombs

• Negative 11.0 nanocoulombs

• Negative 4.0 nanocoulombs

What is the electric field inside the conducting material of the hollow sphere?

• Equal to the charge on the inner surface

• Equal to the charge on the outer surface

• Dependent on the shape of the conductor

• Zero

What is the electric field inside the center sphere at equilibrium?

• Dependent on the radius of the sphere

• Equal to the charge on the surface

• Equal to the charge on the outer sphere

• Zero