Quiz 2: Electric Flux and Electric Potential

Which of the following is the standard (SI) unit for electric flux?

• N/C

• Nm²/C

• Nm²/C²

• C²/Nm²

Which of the following measures the flow of electric field through a surface?

• electric flux

• electric potential

• electric potential difference

• electric potential energy

Which law states that electric flux of the electric field through any closed surface is equal to the net charge enclosed divided by the permittivity of free space?

• Ampere's Law

• Coulomb's Law

• Faraday's Law

• Gauss's Law

A point charge is placed at the center of a spherical gaussian surface. Which of the following will make the electric flux changed?

• If the point charge is moved outside the sphere.

• If a second point charge is placed outside the sphere.

• If the sphere is replaced by a cube of the same volume.

• If the point charge is moved to its position but still inside the sphere.

Which of the following best describes Gauss’s law?

• A law that describes what an electric field will look like due to a known distribution of charge.

• A law that describes what an electric field will look like due to an unknown distribution of charge.

• A law that describes what a magnetic field will look like due to a known distribution of charge.

• A law that describes what an magnetic field will look like due to an unknown distribution of charge.

TRUE or FALSE. A Gaussian surface is a hypothetical surface whether open or closed.

• TRUE

• FALSE

TRUE or FALSE. The direction of the electric flux depends on the magnitude of the net charge of the enclosed surface.

• TRUE

• FALSE

TRUE or FALSE. Gauss’s law relates the electric field of a surface to the net charge enclosed within that surface.

• TRUE

• FALSE

TRUE or FALSE. The electric flux flowing from inside to outside is negative.

• TRUE

• FALSE

TRUE or FALSE. The electric flux of a Gaussian surface is equal to zero if it does not enclose a charged particle.

• TRUE

• FALSE