Electron volt, a unit of energy commonly used in atomic and nuclear physics, equals the energy gained by an electron (a charged particle carrying a unit of electronic charge) when the electrical potential at the electron increases by one volt.
The electron volt equals 1.602 × 10-19 joule.
The abbreviation MeV indicates 106 (1,000,000) electron volts; GeV, 109 (1,000,000,000); and TeV, 1012 (1,000,000,000,000).
Task: Complete the Workbook questions under the topic:
Electron Volts (SciPad p.195- 196)
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The formula symbol for the charge is Q and its SI unit is the coulomb (unit symbol C).
One coulomb consists of 6.24 × 1018 natural units of electric charges, such as individual electrons or protons.
One electron has a negative charge of 1.60 × 10-19 coulomb.
Current is the measure of how fast charge moves around a circuit and has the formula symbol I.
Current is the number of coulombs of charge passing per second in a circuit: I = Q / t
The SI unit of current is the ampere (unit symbol A).
One ampere is one coulomb passing per second (A = C s-1).
Conventional current is the flow of positive charge. This model is easier to use in solving circuits than considering the energy exchanges of negatively charged electrons.
Voltage is the measure of the amount of electrical potential energy Ep a charge gains from an energy source or loses as heat to a resistor as it travels around a circuit, and it is the formula symbol V.
Voltage is the amount of energy in joules that each coulomb of charge gains or loses as it moves around the circuit.
The SI unit of voltage is volt (unit symbol V).
One volt is one joule per coulomb (V = J C-1)