An electron with speed enters a region where the electric potential is 250 V higher…

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential

Problem

An electron with speed 3.0×106 m/s3.0\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=9.11×10−31 kgm=9.11\times10^{-31}\,\text{kg}, elementary charge e=1.60×10−19 Ce=1.60\times10^{-19}\,\text{C}) (a) 6.6×106 m/s6.6\times10^{6}\,\text{m/s} (b) 9.8×106 m/s9.8\times10^{6}\,\text{m/s} (c) 3.0×106 m/s3.0\times10^{6}\,\text{m/s} (d) 1.8×107 m/s1.8\times10^{7}\,\text{m/s}

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