1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
A photosensitive metallic surface has work function, h$$\upsilon $$0. If photons of energy $$2h{\upsilon _0}$$ fall on this surface, the electrons come out with a maximum velocity of 4 $$ \times $$ 106 m/s. When the photon energy is increased to 5 h$$\upsilon $$0, then maximum velocity of photoelectrons will be
A
2 $$ \times $$ 107 m/s
B
2 $$ \times $$ 106 m/s
C
8 $$ \times $$ 106 m/s
D
8 $$ \times $$ 105 m/s
2
AIPMT 2004
MCQ (Single Correct Answer)
+4
-1
According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is
A
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 27 English Option 1
B
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 27 English Option 2
C
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 27 English Option 3
D
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 27 English Option 4
3
AIPMT 2003
MCQ (Single Correct Answer)
+4
-1
J.J. Thomson's cathode-ray tube experiment demonstrated that
A
cathode rays are streams of negatively charged ions
B
all the maas of an atom is essentially in the nucleus
C
the e/m of electrons is much greater than the e/m of protons
D
the e/m ratio of the cathode-ray particles changes when a different gas is placed in the discharge tube
4
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
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