An alpha particle (m = 6.7 × 10?27 kg, q = +3.2 × 10?19 C) has a speed of 20 km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle during this motion. Determine the electric potential difference VA?VB.
A. +4.2 V
B. ?4.2 V
C. ?9.4 V
D. +9.4 V
E. ?8.4 V
Answer: B
You might also like to view...
A string of linear density 1.5 g/m is under a tension of 20. N. What should its length be if its fundamental resonance frequency is 220. Hz?
A) 0.26 m B) 1.1 m C) 0.96 m D) 43. cm E) 2.1 m
In a Young's double-slit experiment, how many maxima occur between the 5th-order maxima?
a. 8 b. 9 c. 10 d. 25 e. Three more than the number of minima.
A uniform meterstick balances on a fulcrum placed at the 40-cm mark when a weight W is placed at the 20-cm mark. What is the weight of the meterstick?
a. W c. W/2 b. 2W d. 0.4W
If the voltage between the plates of a parallel-plate capacitor is doubled, the capacitance of the capacitor
A) is tripled. B) is halved. C) is doubled. D) quadruples. E) remains the same.