An electron is released from rest and accelerated through a potential difference of 500 V

PHYSICS · Single correct · CBSE · Physics · Electrostatic Potential and Capacitance · Electrostatic Potential and Capacitance

Problem

An electron is released from rest and accelerated through a potential difference of 500 V. Ignoring relativistic effects, what is the electron’s speed after the acceleration? (Electron charge magnitude e=1.6×10−19 Ce = 1.6\times10^{-19}\,\text{C}, mass me=9.11×10−31 kgm_e = 9.11\times10^{-31}\,\text{kg}.) (a) 9.4×106 m ⁣⋅ ⁣s−19.4\times10^{6}\,\text{m}\!\cdot\!\text{s}^{-1} (b) 4.2×107 m ⁣⋅ ⁣s−14.2\times10^{7}\,\text{m}\!\cdot\!\text{s}^{-1} (c) 1.3×107 m ⁣⋅ ⁣s−11.3\times10^{7}\,\text{m}\!\cdot\!\text{s}^{-1} (d) 4.2×106 m ⁣⋅ ⁣s−14.2\times10^{6}\,\text{m}\!\cdot\!\text{s}^{-1}

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