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1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A nucleus disintegrated into two nuclear parts which have their velocities in the ratio of $$2:1.$$ The ratio of their nuclear sizes will be
A
$${3^{{\raise0.5ex\hbox{$\scriptstyle 1$} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}}}}:1$$
B
$$1:{2^{1/3}}$$
C
$${2^{1/3}}:1$$
D
$$1:{3^{{\raise0.5ex\hbox{$\scriptstyle 1$} \kern-0.1em/\kern-0.15em \lower0.25ex\hbox{$\scriptstyle 2$}}}}$$
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
An $$\alpha $$-particle of energy $$5$$ $$MeV$$ is scattered through $${180^ \circ }$$ by a fixed uranium nucleus. The distance of closest approach is of the order of
A
$${10^{ - 12}}\,cm$$
B
$${10^{ - 10}}\,cm$$
C
$$1A$$
D
$${10^{ - 15a}}\,cm$$
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which of the following radiations has the least wavelength ?
A
$$\gamma $$ - rays
B
$$\beta $$ - rays
C
$$\alpha $$ - rays
D
$$X$$ - rays
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
When a $${U^{238}}$$ nucleus originally at rest, decays by emitting an alpha particle having a speed $$'u',$$ the recoil speed of the residual nucleus is
A
$${{4\mu } \over {238}}$$
B
$$ - {{4\mu } \over {234}}$$
C
$$ {{4\mu } \over {234}}$$
D
$$ - {{4\mu } \over {238}}$$
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