The Electron: Energy

The energy associated with electrons is so small that, instead of expressing it in Joules, we use the electronvolt  Symbol = eV

Definition: One electron volt is defined as the energy needed to move an electron (which has an electric charge equal to -1) across an electric potential of 1 volt 1 eV = 1.602 × 10*-19 joules

Energy Conversions An electric field causes an electron to accelerate, giving it kinetic energy Loss in potential energy = gain in kinetic energy

Formula for the energy conversion of a charged particle in an electric field: qV = 1/2mv² q = charge of the particle V = voltage through which the particle is accelerated m = mass of the particle v = velocity of the particle

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