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(B) In the Davisson and Germer experiment,the electrons are accelerated by an electric field created by the potential difference $V$ applied between t

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Increasing the potential difference between the anode and filament

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(B) In the Davisson and Germer experiment,the electrons are accelerated by an electric field created by the potential difference $V$ applied between the filament and the anode.According to the work-energy theorem,the kinetic energy $K$ gained by an electron of charge $e$ is given by $K = eV = \frac{1}{2}mv^2$.From this relation,the velocity $v$ is given by $v = \sqrt{\frac{2eV}{m}}$.Since $v \propto \sqrt{V}$,the velocity of the electrons increases as the potential difference $V$ between the anode and the filament is increased.

In the Davisson and Germer experiment,the velocity of electrons emitted from the electron gun can be increased by

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