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Rate of change of the de Broglie wavelength of an electron accelerated from rest by a field E

The same question, asked 2 times: 25 Apr 2025 S2, 15 May 2026 S1. Every wording below, oldest first.

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  1. Question 1

    25 Apr 2025 S2

    36
    An electron of mass ' mm ' and charge ' ee ' initially at rest gets accelerated by a constant electric field ' EE '. The rate of change of de-Broglie wavelength of the electron at time ' tt ' is (Ignore relativistic effect)( h=h = Planck's constant)

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  2. Question 2

    15 May 2026 S1

    144
    An electron of mass mm and charge ee initially at rest gets accelerated by a constant electric field EE. The rate of change of de-Broglie wavelength of the electron at time tt is (hh = Planck's constant)

    Tap an option to check your answer.