A Proton with a Speed of 2 $10 ^ { 5 }$

question 39

Multiple Choice

A proton with a speed of 2.0 x $10 ^ { 5 }$ m/s accelerates through a potential difference and thereby increases its speed to 4.0 x $10 ^ { 5 }$ m/s.Through what magnitude potential difference did the proton accelerate? (e = 1.60 × 10^-19 C ,m_proton = 1.67 × 10^-27 kg)

• A)630 V
• B)210 V
• C)840 V
• D)1000 V
• E)100 V

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