Which of the following statements about electrical charge is true?
A) A positive charge and a negative charge will repel each other.
B) Two positive charges will attract each other.
C) Two negative charges will attract each other.
D) A positive charge and a negative charge will attract each other.
D
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The electric field of a point charge has an inverse ________ behavior
a. r1/2 b. r c. r2 d. r3
Any change of the energy of a system occurs because of
a. energy transfer across the boundaries of the system. b. combustion of fuels within the system. c. radioactive decay of elements within the system. d. all of the above. e. only (b) and (c) above.
Electric power is transmitted over long distances at high voltage because
A) electricity moves faster at higher voltage. B) the lines can be on taller poles. C) lightning does more damage. D) there is less power lost. E) electricity moves slower at higher voltage.
Two charges lie on the x axis, +2q at the origin, and -3q at x = 5.0 m. The point on the x axis where the electric potential has a zero value (when the value at infinity is also zero) is
a. 1.0 m. b. 2.0 m. c. 2.5 m. d. 3.0 m. e. 4.0 m.