An electron, a proton, a deuteron and an alpha particle are all accelerated from rest through the…
An electron, a proton, a deuteron and an alpha particle are all accelerated from rest through the same potential difference. Which one will have the maximum de Broglie wavelength?
- (a)Proton
- (b)Deuteron
- (c)Electron
- (d)Alpha particle
Answer
Answer
AIWritten by AI - it can contain mistakes.
Correct option: (c)
Answer: (c) Electron
The de Broglie wavelength is given by $\lambda = \frac{h}{\sqrt{2mqV}}$. For the same potential difference $V$, $\lambda \propto \frac{1}{\sqrt{mq}}$. Since the electron has the smallest mass, the product $mq$ is smallest, so the electron has the maximum de Broglie wavelength.
From ISC 2026 Physics Paper 1, question 1(A)(iii).