JEE Main 2021 — Structure Of Atom Question with Solution
From: JEE Main 2021 (Online) 20th July Evening Shift
Question
The wavelength of electrons accelerated from rest through a potential difference of 40 kV is x 1012 m. The value of x is ___________. (Nearest integer)
Give : Mass of electron = 9.1 1031 kg
Charge on an electron = 1.6 1019 C
Planck's constant = 6.63 1034 Js
Give : Mass of electron = 9.1 1031 kg
Charge on an electron = 1.6 1019 C
Planck's constant = 6.63 1034 Js
Enter your answer
Show full solutionCorrect answer: 6.15
Correct answer
6.15
Step-by-step explanation
Wavelength of electron is given by
Here q = charge on electron, V = potential difference
x = 6
OR
m
Ans. is 6
Here q = charge on electron, V = potential difference
x = 6
OR
m
Ans. is 6
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