An electron of mass \( m \) and magnitude of charge \( |e| \) initially at rest gets accelerated...

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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 :
(1) \( -\frac{h}{|e| E t} \)
(2) \( -\frac{h}{|e| E \sqrt{t}} \)
(3) \( \frac{-\mathrm{h}}{|\mathrm{e}| \mathrm{Et}^{2}} \)
(4) \( \frac{|\mathrm{c}| \mathrm{Et}}{\mathrm{h}} \)
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