1
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its enf closer to the pole is 20 cm away from the mirror. The length of the image is
A
10 cm
B
15 cm
C
2.5 cm
D
5 cm
2
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons is
A
1 : 4
B
1 : 2
C
1 : 1
D
1 : 5
3
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
If the momentum of an electron is changed by P, then the de Broglie wavelength associated with changes by 0.5%. The initial momentum of electron will be
A
200 P
B
400 P
C
$${P \over {200}}$$
D
100 P
4
AIPMT 2012 Mains
MCQ (Single Correct Answer)
+4
-1
The transition from the state n = 3 to n = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from
A
2 $$ \to $$ 1
B
3 $$ \to $$ 2
C
4 $$ \to $$ 2
D
4 $$ \to $$ 3
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