An electron is accelerated from rest through a potential difference of 150 V
PHYSICS · Multi-part · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics
Problem
An electron is accelerated from rest through a potential difference of 150 V. (Take Planck’s constant h=6.63×10−34J s, electronic charge e=1.60×10−19C, and electron mass me=9.11×10−31kg.)
(i) Calculate the kinetic energy acquired by the electron in joule.
(ii) Determine the magnitude of its linear momentum.
(iii) Hence find its de Broglie wavelength and express the result in ångström to two significant figures.