Question

calculate the de-broglie wavelength of an electron accelerated through a potential difference of 1.25 kilo volt​

Answer 1

The de Broglie wavelength λ=1.23 x 10−9m . If a charge of 1 Coulomb is moved through a potential difference of 1 Volt then 1 Joule of work is done. This is how the Volt is defined. So if a charge of e coulombs is moved through a potential difference of V volts then the work done is eV Joules