1
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
In a discharge tube ionization of enclosed gas is produced due to collisions between
A
neutral gas atoms/molecules
B
positive ions and neutral atoms/molecules
C
negative electrons and neutral atoms/molecules
D
photons and neutral atoms/molecules.
2
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1.5 is placed over the mark. How should the microscope be moved to get the mark in focus again ?
A
2 cm upward
B
1 cm upward
C
4.5 cm downward
D
1 cm downward
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to form a combination of lenses. The power in diopters of the combination is
A
zero
B
25
C
50
D
infinite.
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The momentum of a photon of energy 1 MeV in kg m/s will be
A
5 $$ \times $$ 10$$-$$22
B
0.33 $$ \times $$ 106
C
7 $$ \times $$ 10$$-$$24
D
10$$-$$22