wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The mass of an electron is 9.1×1031 kg. If the K.E. is given as 3.0×1025 J. Calculate the wavelength of the electron.

A
8967oA
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
6242oA
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
7264oA
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
6966oA
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A 8967oA
K.E.=12mv2-----(1)
λ=hmv
v=hmλ ----(2)
By eq. (1) and (2),
K.E.=12m(hmλ)2
λ=h22m K.E
=(6.626×1034)22×9.1×1031kg×3.0×1025J
=8967×107m=8967oA

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon