Module 3: Gauss's Law Flashcards
The electric field outside of a uniformly charged sphere is most like a
a) ring of charge
b) disk of charge
c) parallel plate capacitor
d) point charge
d) point charge
For a uniformly charged sphere, inside the sphere the relationship between electric field strength and distance from the center is
a) quadratic
b) exponential
c) inverse
d) linear
d) linear
A spherical Gaussian surface (#1) encloses and is centered on a point charge +q. A second spherical Gaussian surface (#2) of the same size also encloses the charge but is not centered on it. Compared to the electric flux through surface #1, the flux through surface #2 is
a) greater
b) the same
c) zero
d) less, but not zero
e) not enough information to decide
b) the same
Two-point charges, +q (in red) and –q (in blue), are arranged as shown. Through which closed surface(s) is the net electric flux equal to zero?
both surface C and surface D
A conducting spherical shell with inner radius a and outer radius b has a positive point charge Q located at its center. The total charge on the shell is –3Q, and it is insulated from its surroundings. In the region a < r < b,
a) the electric field points radially inward.
b) the electric field is zero.
c) the electric field points radially outward
d) not enough information to decide
b) the electric field is zero.
There is a negative surface charge density in a certain region on the surface of a solid conductor. Just beneath the surface of this region, the electric field
a) is zero.
b) points inward, away from the surface of the conductor
c) points outward, toward the surface of the conductor.
d) not enough information given to decide
e) points parallel to the surface.
a) is zero.
A positive charge Q is located at the center of an imaginary Gaussian cube of sides a. The flux of the electric field through the surface of the cube is Φ. A second, negative charge -Q is placed next to Q inside the cube. Which of the following statements will be true in this case?
a) The magnitude of the net electric field is constant on the entire surface of the cube
b) The electric field on the surface of the cube is perpendicular to the surface
c) The net electric field on the surface of the cube is equal to zero
d) The net flux through the surface of the cube is equal to zero
e) The net flux through the surface is equal to 2Φ
d) The net flux through the surface of the cube is equal to zero
A small Conducting spherical shell with inner radius a, and outer radius b is concentric with a large conducting spherical shell with inner radius c, and outer radius d as shown in the figure.
The inner shell has a total charge of +2q, and the outer shell has a charge of -4q. The magnitude and direction of the electric field at r > d is:
E = k 2q/r^2 radially inward
A small Conducting spherical shell with inner radius a, and outer radius b is concentric with a large conducting spherical shell with inner radius c and outer radius d as shown in the figure.
The inner shell has total charge +2q, and the outer shell has a charge +4q. The magnitude and direction of the electric field at a < r < b is:
E = 0
A conducting spherical shell with an inner radius and outer radius has a negative point charge Q located at its center. (see figure) The total charge on the shell is -2Q, and it is insulated from its surrounding. The outer charge surface of the shell is:
-3Q
A conducting spherical shell with an inner radius and outer radius has a positive point charge Q located at its center. (see figure) The total charge on the shell is -2Q, and it is insulated from its surrounding. The outer charge surface of the shell is:
-Q
True
For a uniformly charged sphere, outside the sphere the relationship between electric field strength and distance from the center is
a) linear
b) exponential
c) quadratic
d) inverse
d) inverse
A conducting spherical shell with inner radius a, and outer radius b has a positive point charge Q located at its center. The total charge on the shell is –3Q, and it is insulated from its surroundings. In the region r > b,
a) the electric field points radially inward.
b) the electric field points radially outward.
c) the electric field is zero.
d) not enough information given to decide
a) the electric field points radially inward.
A small Conducting spherical shell with inner radius a, and outer radius b is concentric with a large conducting spherical shell with inner radius c, and outer radius d as shown in the figure
The inner shell has a total charge of +2q, and the outer shell has a charge of +4q. The magnitude and direction of the electric field at b < r < c is:
E=k 2q/r^2 radially outward
False
