A particle (charge = 40 ?C) moves directly toward a second particle (charge = 80 ?C) which is held in a fixed position. At an instant when the distance between the two particles is 2.0 m, the kinetic energy of the moving particle is 16 J. Determine the distance separating the two particles when the moving particle is momentarily stopped.
A. 0.75 m
B. 0.84 m
C. 0.95 m
D. 0.68 m
E. 0.56 m
Answer: C
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Many of the mechanical applications of copper alloys are due to high thermal conductivity and excellent _________resistance.
Fill in the blank(s) with the appropriate word(s).
Electromagnetic waves are generated whenever the ____
a. motion of any particle is changed
b. motion of any charged particle changes
c. motion of a positively charged particle is changed
d. motion of a negatively charged particle is changed
e. acceleration of any charged particle is changed
One terminal of a battery is connected to a closed circuit, while the other terminal is left unconnected. Which of the following statements is true?
A) No current flows through the battery, and the potential of any point in the circuit is the same. B) No current flows through the battery, and the potentials of different points in the circuit are different. C) Current flows through the battery, and the potential of any point in the circuit is unchanged. D) Current flows through the battery, and the potentials of different points in the circuit are different.
A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page. The external field decreases to 0.020 T in 12 milliseconds
(a) What is the magnitude of the change in the external magnetic flux enclosed by the coil? (b) What is the magnitude of the average voltage induced in the coil as the external flux is changing? (c) If the coil has a resistance of 4.0 ohms, what is the magnitude of the average current in the coil?