A Proton (M = 1

question 89

Multiple Choice

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 V_B − V_A.

• A) +8.5 V
• B) −8.5 V
• C) −4.8 V
• D) +4.8 V
• E) −17 V

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