Electrons used in an electron microscope are accelerated by a volta...

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Electrons used in an electron microscope are accelerated by a voltage of \( 25 \mathrm{kV} \). If the voltage is increased to \( 100 \mathrm{kV} \), then the de-Broglie wavelength associated with the electrons would
(a) decrease by 2 times
(b) decrease by 4 times
-(c) increase by 4 times
(d) increase by 2 times
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