1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of 3 $$ \times $$ 106 m s$$-$$1. The velocity of the particle is
A
3 $$ \times $$ 10$$-$$31 ms$$-$$1
B
$$2.7 \times {10^{ - 21}}\,m{s^{ - 1}}$$
C
2.7 $$ \times $$ 10$$-$$18 ms$$-$$1
D
9 $$ \times $$ 10$$-$$2 ms$$-$$1
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of
A
collisions between the charged particles emitted from the cathode and the atoms of the gas
B
collision between different electrons of the atoms of the gas
C
excitation of electrons in the atoms
D
collision between the atoms of the gas
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
If M(A; Z), Mp and Mn denote the masses of the nucleus $${}_Z^AX,$$ proton and neutron respectively in units of u (1 u = 931.5 MeV/c2) and BE represents its bonding energy in MeV, then
A
M(A, Z) = ZMp + (A $$-$$ Z)Mn $$-$$ BE
B
M(A, Z) = ZMp + (A $$-$$ Z)Mn + BE/c2
C
M(A, Z) = ZMp + (A $$-$$ Z)Mn $$-$$ BE/c2
D
M(A, Z) = ZMp + (A $$-$$ Z)Mn + BE
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
The ground state energy of hydrogen atom is $$-$$ 13.6 eV. When its electron is in the first excited state, its excitation energy is
A
10.2 eV
B
0
C
3.4 eV
D
6.8 eV
EXAM MAP