Question

A proton and an α –particle are situated at a distance ‘r’ apart. At very large distance apart, when released, the kinetic energy of proton will be

(1) \(\frac{2Ke^2}{r}\)

(2) \(\frac{8Ke^2}{5r}\)

(3) \(\frac{Ke^2}{r}\)

(4) \(\frac{8Ke^2}{r}\)

Answer 1

 (2) \(\frac{8Ke^2}{5r}\)

According to conservation of energy–

According to conservation of momentum.