The electric field in the region defined by the y-z plane and the positive x axis is given by E = ax, where a is a constant. (There is no field for negative values of x.) As x increases in magnitude, relative to V = 0 at the origin, the electric potential in the region defined above is
A. a decreasing function proportional to ?|x2|.
B. a decreasing function proportional to ?|x|.
C. constant.
D. an increasing function proportional to +|x|.
E. an increasing function proportional to +|x2|.
Answer: A
You might also like to view...
How does the differentiation process generate heat?
A. As low-density rock rises to the surface, it carries heat from the interior of the planet. B. As dense material sinks through less dense rock, it generates heat through friction. C. Iron and nickel accumulating at the center of the planet concentrate the planet's heat. D. Heat is generated by the constant bombardment of the planet by planetesimals.
A very light ideal spring with a spring constant (force constant) of 2.5 N/cm pulls horizontally on an 18-kg box that is resting on a horizontal floor
The coefficient of static friction between the box and the floor is 0.65, and the coefficient of kinetic friction is 0.45. (a) How long is the spring just as the box is ready to move? (b) If the spring pulls the box along with a constant forward velocity of 1.75 m/s, how long is the spring? (c) How long is the spring if it pulls the box forward at a constant 2.75 m/s?
A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68 × 10-8 ? ? m. When it carries a current of 15 A, what is the potential difference between two points in the cord that are 100 m apart?
A) 12 V B) 23 V C) 32 V D) 41 V
Which of these statements about the poles of magnets is correct?
a. Like poles repel; unlike poles attract. b. Like poles attract; unlike poles repel. c. Unlike poles attract; like poles have no effect. d. All poles repel. e. All poles attract.