
Gauss's law
Authored by Mohamed Hassan
Physics
University
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
Suppose the radius of the sphere in Example 24.1 (radius 1.00 m, with a charge of +1.00 μC at its center) is changed to 0.500 m. What happens to the flux through the sphere and the magnitude of the electric field at the surface of the sphere?
The flux and field both increase.
The flux and field both decrease.
The flux increases and the field decreases.
The flux decreases and the field increases.
The flux remains the same and the field increases.
2.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
In a charge-free region of space, a closed container is placed in an electric field. A requirement for the total electric flux through the surface of the container to be zero is that
the field must be uniform
the container must be symmetric
the container must be oriented in a certain way
The requirement does not exist – the total electric flux is zero no matter what.
3.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
If the net flux through a gaussian surface is zero, the following four statements could be true. Which of the statements must be true?
(I) There are no charges inside the surface.
(III) The electric field is zero everywhere on the surface.
(IV) The number of electric field lines entering the surface equals the number leaving the surface.
I & IV
II & III
II & IV
I & II
All
4.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
Consider the charge distribution shown in the figure. The charges contributing to the total electric flux through surface S’ are ...
q1 only
q4 only
q2 and q3
all four charges
none of the charges
5.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
Your little brother likes to rub his feet on the carpet and then touch you to give you a shock. While you are trying to escape the shock treatment, you discover a hollow metal cylinder in your basement, large enough to climb inside. In which of the following cases will you not be shocked?
You climb inside the cylinder, making contact with the inner surface, and your charged brother touches the outer metal surface.
Your charged brother is inside touching the inner metal surface and you are outside, touching the outer metal surface.
Both of you are outside the cylinder, touching its outer metal surface but not touching each other directly.
6.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
A solid non-conducting sphere has a radius R and a charge of +Q uniformly distributed throughout its volume. Which graph below describes the electric field as a function of distance r from the center of the sphere?
7.
MULTIPLE CHOICE QUESTION
5 mins • 12 pts
A conducting sphere has a charge +Q and a radius R. Which graph below describes the electric field as a function of distance r from the center of the sphere?
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