#41 Electricity and Magnetism Multiple Choice Solutions - AP Physics C 1998 Released Exam

The video tutorial explains Gauss's Law and its application in calculating electric fields around various conductors. It highlights the convenience of using Gauss's Law for large plates, spheres, solid rods, and hollow cylinders. However, it points out the challenges of applying Gauss's Law to a cube due to inconsistent angles between the electric field and the area vector, making it inconvenient for such shapes.

What is Gauss's law primarily used for?

• Calculating electric fields around any shape

• Calculating electric fields around isolated charge conductors

• Determining the charge of a conductor

• Measuring the magnetic field of a conductor

Which of the following shapes is NOT convenient for using Gauss's law?

• Sphere

• Long hollow cylinder

• Large plate

• Cube

Why is a cube not convenient for applying Gauss's law?

• The area vector is always perpendicular to the electric field

• The electric field is zero at the corners

• The angle between the electric field and area vector is inconsistent

• The electric field is uniform across the surface

How does the electric field change from the midpoint to the corners of a cube?

• It remains constant

• It changes from directly out to a 45-degree angle

• It changes from a 45-degree angle to directly in

• It becomes zero at the corners

What is the angle of the electric field at the corners of a cube?

• 0 degrees

• 90 degrees

• 45 degrees

• 180 degrees