An electron (m = 9.1 × 10^?31 kg, q = ?1.6 × 10^?19 C) starts from rest at point A and has a speed of 5.0 × 10^6 m/s at point B. Only electric forces act on it during this motion. Determine the electric potential difference VA ? VB
a. ?71 V
b. +71 V
c. ?26 V
d. +26 V
e. ?140 V
a
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