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1. The deBroglie wavelength of an electron accelerated to a potential difference of V volts is
(A): ’(h)/(sqrt(2mE)’’dotA’
(B): ’(h)/sqrt(2mkT)’’dotA’
(C): ’hsqrt((150)/(meV))’ ’dotA’
(D): ’sqrt((150)/(V))’’dotA””
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