Question

DApdr Microaft Word-Axsignment 1.doex QUESTION Q1. An electron, accelerated by a potential difference V, has the de Broglie wavelength 10-10 meter. Calculate the value of that accelerating potential V in volt. Use the standard value of mass of the electron, Planck constant etc wherever needed. (5 Marks) ee to soara

Answer 1

We know that De Broglie wave length for electron is

= h/(2mqv)^1/2

m=mass of electron =9.1×10^-31 kg

V=accelerating potential

q=charge of electron =1.6×10^-19 C

h=Plank's constent 6.62×10^-34​​​​​ Joule ×second

So putting the values in above equation

V= h²/2mq×(wavelength)²

  V=(6.62×10^​​-34)²/2×9.1×10^​-31×1.6×10^{​​​​​-19}×10^{​​​​​-20}

V= 150.495 volt . Answer