1
AIEEE 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The energy spectrum of $$\beta $$-particles [ number $$N(E)$$ as a function of $$\beta $$-energy $$E$$ ] emitted from a radioactive source is
A
AIEEE 2006 Physics - Atoms and Nuclei Question 210 English Option 1
B
AIEEE 2006 Physics - Atoms and Nuclei Question 210 English Option 2
C
AIEEE 2006 Physics - Atoms and Nuclei Question 210 English Option 3
D
AIEEE 2006 Physics - Atoms and Nuclei Question 210 English Option 4
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
If radius of the $$\matrix{ {27} \cr {13} \cr } $$ $$Al$$ nucleus is estimated to be $$3.6$$ fermi then the radius of $$\matrix{ {125} \cr {52} \cr } \,Te$$ nucleus is estimated to be nearly
A
$$8$$ fermi
B
$$6$$ fermi
C
$$5$$ fermi
D
$$4$$ fermi
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Starting with a sample of pure $${}^{66}Cu,{7 \over 8}$$ of it decays into $$Zn$$ in $$15$$ minutes. The corresponding half life is
A
$$15$$ minutes
B
$$10$$ minutes
C
$$7{1 \over 2}$$ minutes
D
$$5$$ minutes
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The intensity of gamma radiation from a given source is $$L$$. On passing through $$36$$ $$mm$$ of lead, it is reduced to $${{\rm I} \over 8}.$$ The thickness of lead which will reduce the intensity to $${{\rm I} \over 2}$$ will be
A
$$9mm$$
B
$$6mm$$
C
$$12mm$$
D
$$18mm$$
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