1
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential $$V$$ and then made to describe semicircular paths of radius R using a magnetic field B. If V and B are kept constant, the ratio $$\left( {{{ch\arg e\,\,on\,\,\,the\,\,ion\,\,} \over {mass\,\,of\,\,the\,\,ion}}} \right)$$ will be proportional to
A
1/R2
B
R2
C
R
D
1/R
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
A nucleus $${}_Z^AX$$ has mass represented by M(A, Z). If Mp and Mn denote the mass of proton and neutron respectively and B.E. the binding energy in MeV, then
A
B.E. = [ZMp + (A $$-$$ Z)Mn $$-$$ M(A, Z)]c2
B
B.E. = [ZMp + AMp $$-$$ M(A, Z)]c2
C
B.E. = M(A, Z) $$-$$ ZMp $$-$$ (A $$-$$ Z)Mn
D
B.E. = [M(A, Z) $$-$$ ZMp $$-$$ (A $$-$$ Z)Mn]c2
3
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
If the nucleus $${}_{13}^{27}Al$$ has a nuclear radius of about 3.6 fm, them $${}_{32}^{125}Te$$ would have its radius approximately as
A
9.6 fm
B
12.0 fm
C
4.8 fm
D
6.0 fm
4
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
The total energy of electron in the ground state of hydrogen atom is $$-$$ 13.6 eV. The kinetic energy of an electron in the first excited state is
A
6.8 eV
B
13.6 eV
C
1.7 eV
D
3.4 eV.
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12