Question 1
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.
◦
+8.5 V
◦
−8.5 V
◦
−4.8 V
◦
+4.8 V
◦
−17 V
Question 2
A proton (mass = 1.67 × 10−27 kg, charge = 1.60 × 10−19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 50 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB−VA.
◦
+20 V
◦
−20 V
◦
−27 V
◦
+27 V
◦
−40 V