The work function of a metal is 4.65ev and the metal is illuminated with a radiation of 6.86ev. What is the kinetic energy of the electrons ejected from the surface of the metal?

by | Sep 1 | Physics WAEC | 0 comments

A. 1.48ev
B. 2.21ev
C. 4.42ev
D. 5.75ev
E. 11.51ev

Correct Answer:

Option B = 2.21ev

Explanation

K.E = ½mv²

E – W = 6.86 – 4.65

= 2.21ev

Users Also Read These:

Copyright warnings! Do not copy.