1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine ? (g = 10 m/s2)
A
12.3 kW
B
7.0 kW
C
8.1 kW
D
10.2 kW
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is :
A
40 ms$$-$$1
B
120 ms$$-$$1
C
100 ms$$-$$1
D
80 ms$$-$$1
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90o. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is
A
$${{M{L^2}} \over 6}$$
B
$${{\sqrt 2 M{L^2}} \over {24}}$$
C
$${{M{L^2}} \over {24}}$$
D
$${{M{L^2}} \over {12}}$$
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around their respective axes is
A
$$\sqrt 2 :1$$
B
$$\sqrt 2 :\sqrt 3 $$
C
$$\sqrt 3 :\sqrt 2 $$
D
$$1:\sqrt 2 $$
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