A singly ionized helium ion (charge

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

+e

, mass

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

) starts from rest and is accelerated across a

2.5\,\text{kV}

potential difference. Calculate its final speed. Give your answer in

\text{m\,s}^{-1}

to two significant figures.