1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy 12.1 eV. According to Bohr's theory, the spectral lines emited by hydrogen will be
A
one
B
two
C
three
D
four
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a radioactive material the activity at time t1 is R1 and at a later time t2, it is R2. If the decay constant of the material is $$\lambda $$, then
A
R1 = R2
B
R1 = R2e$$-$$$$\lambda $$(t1$$-$$t2)
C
R1 = R2e$$\lambda $$(t1$$-$$t2)
D
R1 = R2(t2/t1).
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The binding energy of deuteron is 2.2 MeV and that of $${}_2^4$$He is 28 MeV. If two deuterons are fused to form one $${}_2^4$$He then the energy released is
A
30.2 MeV
B
25.8 MeV
C
23.6 MeV
D
19.2 MeV
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The radius of germanium (Ge) nuclide is measured to be twice the radius of $${}_4^9$$Be. The number of nucleons in Ge are
A
72
B
73
C
74
D
75
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