Physics

Problem

An electron with speed

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

enters a region where the electric potential is 250 V higher than the point of entry. After reaching the higher-potential region, what is the electron’s speed? (Electron mass

m=9.11\times10^{-31}\,\text{kg}

, elementary charge

e=1.60\times10^{-19}\,\text{C}

) a)

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

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

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

1.8\times10^{7}\,\text{m/s}

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