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 V_A- V_B.

• A)+4.2 V
• B)-4.2 V
• C)-9.4 V
• D)+9.4 V
• E)-8.4 V

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