A point charge +Q is located on the x axis at x = a, and a second point charge ?Q is located on the x axis at x = ?
a. A Gaussian surface with radius r = 2a is centered at the origin. The flux through this Gaussian surface is
a. zero because the negative flux over one hemisphere is equal to the positive flux over the other.
b. greater than zero.
c. zero because at every point on the surface the electric field has no component perpendicular to the surface.
d. zero because the electric field is zero at every point on the surface.
e. none of the above.
a
You might also like to view...
A 41-turn square coil of area 0.074 m2 and a 123-turn circular coil are both placed perpendicular to the same changing magnetic field. The voltage induced in each of the coils is the same. What is the area of the circular coil?
a. 0.22 m2 b. 0.82 m2 c. 0.025 m2 d. 0.074 m2 e. 0.67 m2
White dwarfs have such a low luminosity that even the nearest white dwarfs are not visible to the naked eye
Indicate whether the statement is true or false
The pressure of an ideal gas is doubled during a process in which the energy given up as heat by the gas equals the work done on the gas. As a result, the volume is:
A. doubled B. halved C. unchanged D. need more information to answer E. nonsense; the process is impossible
The fusion reaction 
releases 17.6 MeV of energy. The mass of 2H is 2.01410 u, the mass of 4He is 4.00260 u, and the mass of 1n is 1.00866 u. What is the mass of 3H?
A. 2.99716 u B. 3.01605 u C. 3.03494 u D. 3.04221 u E. 2.99982 u