A stream of electrons is passed between two charged plates at potential difference V (esu). If e and m are charge and mass of electron, the value of h/λ (λ = de Broglie wavelength) is
0.√(2meV)
1.√(meV)
2.√(2meV)
3.meV
Explanation
KE = eV = p²/(2m) → p = √(2meV). By de Broglie, h/λ = p = √(2meV).