1
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then
A
each emitted electron carries one quarter of the initial energy
B
number of electrons emitted is half the initial number
C
each emitted electron carries half the initial energy
D
number of electrons emitted is a quarter of the initial number
2
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
An electron is moving round the nucleus of a hydrogen atom in a circular orbit of radius r. The Coulomb force $$\overrightarrow F $$ between the two is
A
$$K{{{e^2}} \over {{r^2}}}\widehat r$$
B
$$ - K{{{e^2}} \over {{r^3}}}\widehat r$$
C
$$K{{{e^2}} \over {{r^3}}}\widehat r$$
D
$$ - K{{{e^2}} \over {{r^2}}}\widehat r$$
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
Solar energy is mainly caused due to
A
burning of hydrogen in the oxygen
B
fission of uranium present in the Sun
C
fusion of protons during synthesis of heavier elements
D
gravitational contraction
4
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
EXAM MAP