Author Question: A particle (m = 2.0 mg, q = -5.0 mC) has a speed of 30 m/s at point A and moves (with only electric ... (Read 37 times)

tuffie · **on:** Jul 28, 2018

A particle (m = 2.0 mg, q = -5.0 mC) has a speed of 30 m/s at point A and moves (with only electric forces acting on it) to point B where its speed is 80 m/s. Determine the electric potential difference VA - VB.
a. -2.2 kV
b. +1.1 kV
c. -1.1 kV
d. +2.2 kV
e. +1.3 kV

Question 2

A proton (m = 1.7 10-27 kg, q = +1.6 10-19 C) starts from rest at point A and has a speed of 40 km/s at point B. Only electric forces act on it during this motion. Determine the electric potential difference VB - VA.
a. +8.5 V
b. -8.5 V
c. -4.8 V
d. +4.8 V
e. -17 V