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An Alpha Particle (M = 6

Question 14

Multiple Choice

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

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