A non-SI unit that is often used is the electron volt (eV). It is the amount of

Question

A non-SI unit that is often used is the electron volt (eV). It is the amount of kinetic energy an electron has when it reaches the hole in top of the capacitor and there is 1.00 V of potential difference between the plates (See the figure below).

(a) How many Joules are in an electron volt

(b) A particle with a charge of 2e is accelerated through 4.00 kV. How much energy does it have in electron volts?

(c) How much energy does the particle of part (b) have in joules?

A non-SI unit that is often used is the electron volt (eV). It is the amount of kinetic energy an electron has when it reaches the hole in top of the capacitor and there is 1.00 V of potential difference between the plates (See the figure below). How many Joules are in an electron volt A particle with a charge of 2e is accelerated through 4.00 kV. How much energy does it have in electron volts? How much energy does the particle of part (b) have in joules?

Explanation / Answer

1eV= qV

1.602*10^-19*1

= 1.602*10^-19 J

b). E= qV

=4*2e*10^3 V

= 8000 eV

c) 8*10^3*1.602*10^-19

1.28*10^-15 J

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