12.Atoms
medium

In a Rutherford scattering experiment when a projectile of charge $z_1$ and mass $M_1$ approaches a target nucleus of charge $z_2$ and mass $M_2$, the distance of closest approach is $r_0$ The energy of the projectile is 

A

directly proportional to $Z_1 Z_2$ 

B

inversely  proportional to $Z_1$ 

C

directly proportional to $m_1\times m_2 $ 

D

directly proportional to mass  $m_1 $ 

(AIPMT-2009)

Solution

Energy of the projectile is the potential energy at closest approach, $\frac{1}{4 \pi \varepsilon_{0}} \frac{z_{1} z_{2}}{r}$

Therefore energy $\propto z_{1} z_{2}$.

Standard 12
Physics

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