1
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the coil, the current in the coil will be
A
2.0 A
B
4.0 A
C
8.0 A
D
$${{20} \over {\sqrt {13} }}A$$
2
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
The r.m.s. value of potential difference V shown in the figure is

AIPMT 2011 Mains Physics - Alternating Current Question 41 English
A
$${{{V_0}} \over {\sqrt 3 }}$$
B
V0
C
$${{{V_0}} \over {\sqrt 2 }}$$
D
$${{{V_0}} \over 2}$$
3
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens is
A
5 cm
B
$$-$$ 10 cm
C
20 cm
D
$$-$$ 30 cm
4
AIPMT 2011 Mains
MCQ (Single Correct Answer)
+4
-1
A thin prism of angle 15o made of glass of refractive index $$\mu $$1 = 1.5 is combined with another prism of glass of refractive index $$\mu $$2 = 1.75. The combination of the prisms produces dispersion without deviation. The angle of the second prism should be
A
5o
B
7o
C
10o
D
12o
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