1
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A/2). The angle of minimum deviation is
A
90o $$-$$ A
B
180o + 2A
C
180o $$-$$ 3A
D
180o $$-$$ 2A
2
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
In a double slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double slit within the central maxima of single slit pattern ?
A
0.5 mm
B
0.02 mm
C
0.2 mm
D
0.1 mm
3
AIPMT 2015 Cancelled Paper
MCQ (Single Correct Answer)
+4
-1
Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed with their convex surfaces in contact at the centre. The intervening space is filled with oil of refractive index 1.7. The focal length of the combination is
A
$$-$$ 50 cm
B
50 cm
C
$$-$$ 20 cm
D
$$-$$ 25 cm
4
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$$\lambda $$
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