A rod (length = 2.0 m) is uniformly charged and has a total charge of 40 nC. What is the magnitude of the electric field at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
A. 40 N/C
B. 45 N/C
C. 24 N/C
D. 90 N/C
E. 36 N/C
Answer: B
You might also like to view...
Radioactive Decay: A radioactive sample has a half-life of 10 min. What fraction of the sample is left after 40 min?
A. 1/2 B. 1/4 C. 1/8 D. 1/16
Magnetic Field of a Long Wire: A wire lying in the plane of this page carries a current directly toward the top of the page. What is the direction of the magnetic force this current produces on an electron that is moving perpendicular to the page and outward from it on the left side of the wire?
A. perpendicular to the page and towards you B. perpendicular to the page and away from you C. toward the top of the page D. toward the bottom of the page E. The force is zero.
Which of the following statements about the moons of the jovian planets is true?
A) Most of the moons have the potato-like shapes of asteroids, but a few are large enough to be spherical in shape. B) Even the biggest moons are smaller than any of the planets or dwarf planets in our solar system. C) All of the moons are barren and essentially airless, like our own Moon. D) The moons are made almost entirely of rock and metal.
Which objects in the solar system have been least modified since the formation of the solar system?
A) asteroids B) Kuiper Belt objects C) meteoroids D) terrestrial planets E) jovian moons