Question

Plot a graph showing the variation of de Broglie wavelength (X) associated with a charged a particle of mass m, versus  `1/sqrtV` where V is the potential difference through which the particle is accelerated. How does this graph give us information regarding the magnitude of the charge of the particle? 

Answer 1

The slope of the graph is `h/sqrt(2mq)`considering we know the slope and mass of the charged particle we can easily calculate the charge.