1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einstein's equation the metals which will emit photoelectrons for a radiation of wavelength 4100 $$\mathop A\limits^ \circ $$ is/are
A
A only
B
A and B only
C
all the three metals
D
none
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 31 English Option 1
B
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 31 English Option 2
C
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 31 English Option 3
D
AIPMT 2004 Physics - Dual Nature of Radiation and Matter Question 31 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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