1
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
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The power obtained in a reactor using U235 disintegration is 1000 kW. The mass decay of U235 per hour is
A
10 microgram
B
20 microgram
C
40 microgram
D
1 microgram
3
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The wavelength of the first line of Lyman series for hydrogen atom is equal to that of the second line of Balmer series for a hydrogen like ion. The atomic number Z of hydrogen like ion is
A
3
B
4
C
1
D
2
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