Physics · Modern Physics
The wavelength of electrons accelerated from rest through a potential difference of 40 kV is x × 10-12 m. The value of x is (Nearest integer): Given: Mass of electron = 9.1 × 10-31 kg Charge on an electron = 1.6 × 10-19 C Planck's constant = 6.63 × 10-34 J s
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