The flux is zero because the negative flux over one hemisphere is equal to the positive flux over the other. 2.The flux is greater than zero. 3.The flux is zero because at every point on the surface the electric field has no component perpendicular to the surface. 4.The flux is zero because the electric field is zero at every point on the surface. 5.None of the above.

A hemispherical surface (half of a spherical surface) of radius R is located in a uniform electric field of magnitude E that is parallel to the axis of the hemisphere. What is the magnitude of the electric flux through the hemisphere surface?

N/C 2.28 N/C 3.17 N/C 4.23 N/C 5.38 N/C

kN/C kN/C kN/C kN/C kN/C

N/C N/C N/C N/C N/C

Each 2.2-m length of a long cylinder (radius = 4.1 mm) has a charge of 3.0 nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point 5.1 mm from the axis of the cylinder? kN/C kN/C kN/C kN/C kN/C

N/C 2.30 N/C 3.18 N/C 4.38 N/C 5.45 N/C

A long cylindrical shell (radius = 2.5 cm) has a charge uniformly distributed on its surface. If the magnitude of the electric field at a point 5.7 cm radially outward from the axis of the shell is 84 N/C, how much charge is distributed on a 1.6-m length of the charged cylindrical surface? nC nC nC nC nC

N/C N/C N/C N/C N/C

kN/C kN/C kN/C kN/C kN/C

N/C N/C N/C N/C N/C

A 4.7-nC point charge is embedded at the center of a nonconducting sphere (radius = 2.3 cm) which has a charge of nC distributed uniformly throughout its volume. What is the magnitude of the electric field at a point that is 1.0 cm from the center of the sphere?

N/C 2.51 N/C 3.19 N/C 4.62 N/C 5.24 N/C

N/C N/C N/C N/C N/C

N/C N/C N/C N/C N/C

If the electric field just outside a thin conducting sheet is equal to 2.3 N/C, determine the surface charge density on the conductor

N/C 2.zero N/C 4.14 N/C 5.33 N/C

The electric field just outside the surface of a hollow conducting sphere of radius 22 cm has a magnitude of 550 N/C and is directed outward. An unknown charge Q is introduced into the center of the sphere and it is noted that the electric field is still directed outward but has decreased to 100 N/C. What is the magnitude of the charge Q? nC nC nC nC nC

An astronaut is in an all-metal chamber outside the space station when a solar storm results in the deposit of a large negative charge on the station. Which statement is correct? The astronaut does not need to worry: the charge will remain on the outside surface. 2.The astronaut must abandon the chamber immediately to avoid being electrocuted. 3.The astronaut will be safe only if she is wearing a spacesuit made of nonconducting materials. 4.The astronaut must abandon the chamber if the electric field on the outside surface becomes greater than the breakdown field of air. 5.The astronaut must abandon the chamber immediately because the electric field inside the chamber is non-uniform.

A, positive 2.C, negative 3.B, negative 4.B, positive 5.C, positive

there is no electric field present in this region of space 2.there is a constant E field present in this region of space 3.the electric flux has a constant value of zero 4.any of the above may be correct 5.only the second and the third variants above may be correct

Which one of the following is not an expression for electric charge?

The flux and field both increase. 2.The flux and field both decrease. 3.The flux increases and the field decreases. 4.The flux decreases and the field increases. 5.The flux remains the same and the field increases. 6.The flux decreases and the field remains the same.

If the net flux through a gaussian surface is zero, the following four statements could be true. Which of the statements must be true? There are no charges inside the surface. 2.The net charge inside the surface is zero. 3.The electric field is zero everywhere on the surface. 4.The number of electric field lines entering the surface equals the number leaving the surface.