caesium has a work function of 3 x 10-19J the m... - JAMB Physics 2008 Question
caesium has a work function of 3 x 10-19J. the maximum energy of liberated electrons when it is illuminated by light of frequency 6.7 x 1014
HZ is?
[h = 6.6 x 1010-34Js]
A
1.42 x 10-19J
B
3.00 x 10-19J
C
4.42 x 1010-19J
D
7.42 x 10-19J
Ask EduPadi AI for a Detailed Answer
Correct Option: A
Max kinetic energy = Energy of incident electron - work function. EK = hf - w
= 6.6 x 10-34 x 6.7 x 1014 - 3 x 10-19
= 4.422 x 10-19 - 3 x 10-19
= 1.422 x 10-19J
Please share this, thanks:
#JAMB #JAMB
Add your answer
No responses