A proton (mass

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A proton (mass

1.67\times10^{-27}\,\text{kg}

, charge

+1.60\times10^{-19}\,\text{C}

) is released from rest and accelerates through a potential difference of

2.5\,\text{kV}

. Assuming non-relativistic speeds, what is the proton’s speed after the acceleration? (a)

9.8\times10^{5}\,\text{m/s}

(b)

6.9\times10^{5}\,\text{m/s}

(c)

2.2\times10^{6}\,\text{m/s}

(d)

4.9\times10^{5}\,\text{m/s}