The de Broglie wavelength of an electron accelerated through potential V is:
Aλ = h/√(2meV)
Bλ = h/meV
Cλ = √(2meV)/h
Dλ = meV/h
Question 2
The Bohr model postulated that the angular momentum of electrons is quantised as:
AL = nh (n = 1,2,3...)
BL = nh/2π = nℏ
CL = n²h/2π
DL = h/n
Question 3
The binding energy per nucleon is maximum for iron-56 (~8.8 MeV/nucleon). This means:
AIron is the most radioactive element
BElements lighter than Fe can release energy
CIron has the smallest nucleus
DIron cannot undergo any nuclear reaction
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