1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A radioactive nucleus of mass M emits a photon of frequency $$v$$ and the nucleus recoils. The recoil energy will be
A
Mc2 $$-$$ h$$v$$
B
h2$$\upsilon $$2/2Mc2
C
zero
D
h$$v$$
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A nucleus $${}_n^mX$$ emits one $$\alpha $$ particle and two $$\beta $$ particles. The resulting nucleus is
A
$${}_{n - 4}^{m - 6}Z$$
B
$${}_n^{m - 6}Z$$
C
$${}_n^{m - 4}X$$
D
$${}_{n - 2}^{m - 4}Y$$
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
Fusion reaction takes place at high temperature because
A
nuclei break up at high temperature
B
atoms get ionised at high temperature
C
kinetic energy is high enough to overcome the coulomb repulsion between nuclei
D
molecules break up at high temperature
4
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
If a small amount of antimony is added to germanium crystal
A
it becomes a p-type semiconductor
B
the antimony becomes an acceptor atom
C
there will be more free electrons than holes in the semiconductor
D
its resistance is increased
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