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Physics · 2023 · 3 marks
CBSE 2023 · Region 3 · Set 3 · Q30
(a) The figure shows de Broglie wavelength ( λ ) for two particles A and B having same charges but different masses as a function of 1/(√ V), where V…
(a)
The figure shows de Broglie wavelength ( $\displaystyle \lambda$ ) for two particles A and B having same charges but different masses as a function of $\displaystyle \frac{1}{\sqrt{\mathrm{~V}}}$, where V is the potential through which the particles are accelerated.
(i)
Which of them is heavier and why?
(ii)
What does the slope of the line represent?
(b)
Calculate the momentum of an electron having de Broglie wavelength of $\displaystyle 3 \cdot 0 \AA$.
Marking-scheme solution
(a) (i) B is heavier than A Reason- Slope \(\displaystyle \alpha \frac{1}{\sqrt{m}}\)
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