Class 11

30. Atom And Nucleus question bank (Physics)

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Q1.

An \(\alpha\)-particle of energy \(5\ \text{MeV}\) is scattered through \(180^\circ\) by a gold nucleus. The distance of closest approach is of the order of

(A)
\(10^{-12}\ \text{cm}\)
(B)
\(10^{-16}\ \text{cm}\)
(C)
\(10^{-10}\ \text{cm}\)
(D)
\(10^{-14}\ \text{cm}\)
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Q2.

The distance of closest approach for an alpha nucleus of velocity \(v\) bombarding a stationary heavy nucleus target of charge \(Ze\) is directly proportional to

(A)
\(v\)
(B)
\(m\)
(C)
\(\frac{1}{v^{2}}\)
(D)
\(\frac{1}{Ze}\)
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