The electrostatic force between two positive point charges doubles. Which of the following is the most likely explanation for this?()
A. The mass of one of the particles doubled.
B. The charge on both particles doubled.
C. The charge on one particle was halved.
D. The distance between the charges was doubled.
E. The charge on one particle was quadrupled, while the other was halved.
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Two 1 kg spheres each carry a charge of 1 C. Compared to the electrostatic force between the spheres, the gravitational force between them is ()
A. much greater
B. about equal
C. much less
D. more dependent upon the distance
E. stronger if the charges are the same sign, but weaker if the charges have opposite signs
The motion of large bodies at great distances is governed primarily by gravity and not by the electrostatic force because ()
A. gravity is a much stronger force than the electrostatic force
B. the electrostatic force is felt only over short distances
C. of the relative scarcity of antiparticles
D. the majority of matter is electrically neutral
E. the electrostatic force is canceled out by the magnetic force
Based on Gauss' Law, which of the following affects the electric flux through a Gaussian surface? ()
A. a magnetic monopole enclosed by the surface
B. a magnetic dipole outside of the surface
C. a stationary electric charge enclosed by the surface
D. a stationary electric charge outside the surface
E. a charge moving with a constant velocity outside the surface
All of the following are true about Gauss' law EXCEPT()
A. Gauss' law refers to the flux through a closed surface.
B. Gauss' law states that the flux through the closed surface is proportional to the total charge within the surface.
C. Gauss' law is useful when the electric field is perpendicular to the differential area.
D. Gauss' law is useful when the electric field is zero.
E. A rectangle is an example of a Gaussian surface.
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