When a charged particle is moved along an electric field line,
a. the electric field does no work on the charge. b. the electrical potential energy of the charge does not change. c. the electrical potential energy of the charge undergoes the maximum change in magnitude. d. the voltage changes, but there is no change in electrical potential energy.
e. the electrical potential energy undergoes the maximum change, but there is no change in voltage.
C
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An object is placed in front of a thin lens. Which statements are correct in describing the image formed by the lens?
A. If the lens is convex, the image will never be virtual. B. If the image is real, then it is also inverted. C. If the image is real, then it is also upright. D. If the lens is concave, the image must be virtual. E. If the lens is convex, the image must be real.
When light is either reflected or refracted, the quantity that does not change in either process is its
A. direction of travel. B. dispersion. C. frequency. D. speed. E. wavelength.
A satellite that is in a circular orbit 230 km above the surface of the planet Zeeman-474 has an orbital period of 89 min. The radius of Zeeman-474 is 6.38 × 106 m. What is the mass of this planet? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 6.0 × 1024 kg B) 5.5 × 1024 kg C) 5.0 × 1024 kg D) 6.5 × 1024 kg
You are inside a jet plane moving at a constant velocity. You toss a rock straight up in the air, and then you keep your hand at the point of release. The rock will come down
A) in front of your hand. B) in your hand. C) behind your hand. D) beside your hand. E) Actually the rock won't come down.