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An electron of mass \( m \) and magnitude of charge \( |e| \) initially at rest gets accelerated by a constant electric …

Q1

An electron of mass \( m \) and magnitude of charge \( |e| \) initially at rest gets accelerated by a constant electric field E. The rate of change of de-Broglie wavelength of this electron at time \( t \) ignoring relativistic effects is:

[JEE Main 2020, 9 Jan (Shift 2)]

a

\( -\frac{h}{|e| E t} \)

b

\( -\frac{h}{|e| E \sqrt{t}} \)

c

\( \frac{-\mathrm{h}}{|\mathrm{e}| \mathrm{Et}^{2}} \)

d

\( \frac{|\mathrm{e}| \mathrm{Et}}{\mathrm{h}} \)

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