If electron are accelerated from rest through a... - JAMB Physics 2008 Question
If electron are accelerated from rest through a potential difference of 10kv, what is the wavelength of the associated electron
[m = 9.1 x 10-31kg, e = 1.6 x 10-19C, h = 6.6 x 10-34js]
[m = 9.1 x 10-31kg, e = 1.6 x 10-19C, h = 6.6 x 10-34js]
A
1.22 x 10-11m
B
3.87 x 10-10m
C
2.27 x 1011m
D
2.27 x 1014m
correct option: a
| λ = | __h |
| √(2evm) |
| = | ____6.6 x 10-34 |
| √(2 x 1.6x10-19 x 10000 x 9.1x10-34) |
1.223 x 10-11m
Please share this, thanks:
Add your answer
No responses