1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
A certain metallic surface is illuminated with monochromatic light of wavelength, $$\lambda .$$ The stopping potential for photo-electric current for this light is 3V0. If the same surface is illuminated with light of wavelength 2 $$\lambda $$, the stopping potential is V0. The threshold wavelength for this surface for photo-electric effect is
A
$${\lambda \over 4}$$
B
$${\lambda \over 6}$$
C
6$$\lambda $$
D
4$$\lambda $$
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Which of the following figures represent the variation of particle momentum and the associated de-Broglie wavelength?
A
AIPMT 2015 Cancelled Paper Physics - Dual Nature of Radiation and Matter Question 68 English Option 1
B
AIPMT 2015 Cancelled Paper Physics - Dual Nature of Radiation and Matter Question 68 English Option 2
C
AIPMT 2015 Cancelled Paper Physics - Dual Nature of Radiation and Matter Question 68 English Option 3
D
AIPMT 2015 Cancelled Paper Physics - Dual Nature of Radiation and Matter Question 68 English Option 4
3
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
When the energy of the incident radiation is increased nby 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is
A
0.65 eV
B
1.0 eV
C
1.3 eV
D
1.5 eV
4
AIPMT 2014
MCQ (Single Correct Answer)
+4
-1
If the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de Broglie wavelength of the particle is
A
25
B
75
C
60
D
50
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