Which statements are true for an electron moving in the direction of an electric field? (There may be more than one correct choice.)
A) Its electric potential energy increases as it goes from high to low potential.
B) Its electric potential energy decreases as it goes from high to low potential.
C) Its potential energy increases as its kinetic energy decreases.
D) Its kinetic energy decreases as it moves in the direction of the electric field.
E) Its kinetic energy increases as it moves in the direction of the electric field.
A, C, D
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The three point charges +4.0 ?C, -5.0 ?C, and -9.0 ?C are placed on the x-axis at the points x = 0 cm, x = 40 cm, and x = 120 cm, respectively
What is the x component of the electrostatic force on the -9.0 ?C charge due to the other two charges? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) -0.55 N B) 0.55 N C) 0.64 N D) 0.41 N E) -0.41 N
A series LCR AC circuit is at resonance. It contains a resistor of 16 W, a capacitor of 0.35 mF, and an inductor of 90 mH. If an effective (rms) voltage of 150 V is applied, what is the effective (rms) current when the circuit is in resonance?
a. 9.4 A c. 5.0 A b. 3.3 A d. 16.1 A
The circuit below contains three 100-W light bulbs. The emf ? = 110 V. Which light bulb(s) is(are) brightest?
A. A B. B C. C D. B and C E. All three are equally bright.
Brief increases in atmospheric sulfur in Venus's atmosphere may be due to
A. chemical reactions between sulfuric acid clouds and the surface. B. cloud-to-cloud lightning in Venus's atmosphere. C. a large meteor entering Venus's atmosphere. D. a volcanic eruption on Venus's surface.