Plot a graph showing variation of de Broglie ...

CBSE Class 12 Physics 2019 Delhi Set 1 Paper

Question : 12 of 27

Marks: +1, -0

Plot a graph showing variation of de Broglie wavelength

(\lambda)

associated with a charged particle of mass

m

, versus

\frac{1}{\sqrt{V}}

, where

V

is the potential difference through which the particle is accelerated. How does this graph give us the information regarding the magnitude of the charge of the particles?

Solution:

Plot of the graph showing the variation of

\lambda

\frac{1}{\sqrt{V}}

Information regarding magnitude of charge

\because \lambda = \frac{h}{\sqrt{2 m q V}}

\frac{\lambda}{\frac{1}{\sqrt{V}}} = \frac{h}{\sqrt{2 m q}} = \text{slope}

q = \frac{h^2}{2 m (\text{slope})^2}

Go to Question:

Prev Question

Next Question