1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The volume occupied by an atom is greater than the volume of the nucleus by a factor of about
A
101
B
105
C
1010
D
1015
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u = atomic mass unit). The binding energy of $${}_2^4$$ He is
(Given helium nucleus mass $$ \approx $$ 4.0015 u.)
A
0.0305 J
B
0.0305 erg
C
28.4 MeV
D
0.061 u
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
In which of the following systems will the radius of the first orbit (n = 1) be minimum ?
A
doubly ionized lithium
B
singly ionized helium
C
deuterium atom
D
hydrogen atom
4
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Reverse bias applied to a junction diode
A
lowers the potential barrier
B
raises the potential barrier
C
increases the majority carrier current
D
increases the minority carrier current
EXAM MAP