Two electric charges +Q and -Q, are separated by a distance d. If you make a graph of the electric potential as a function of the distance along the line connecting the two charges, the point exactly midway between the two charges would
A) be a relative maximum.
B) be a relative minimum.
C) be neither a relative maximum nor a relative minimum.
D) oscillate between being a relative maximum and a relative minimum.
C
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Two objects move toward each other due to gravity. As the objects get closer and closer, the force between them
A) increases. B) decreases. C) remains constant.
An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid X and 581 km from the center of asteroid Y, along the straight line joining the centers of the asteroids. What is the ratio of the masses X/Y of the asteroids?
A) 0.0581 B) 17.2 C) 0.241 D) 4.15
Which of the following statements is false?
a. Energy can be converted from one form to another. b. Energy comes in different forms. c. Energy can be stored to a greater or lesser extent. d. Energy can be moved or transferred. e. Energy is constantly being destroyed by humans.
Four identical point charges (+6.0 nC) are placed at the corners of a rectangle which measures 6.0 m × 8.0 m. If the electric potential is taken to be zero at infinity, what is the potential at the geometric center of this rectangle?
a. 58 V b. 63 V c. 43 V d. 84 V e. 11 V