1
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
The height at which the weight of a body becomes $${\left( {{1 \over {16}}} \right)^{th}}$$, its weight on the surface of earth (radius R), is
A
5R
B
15R
C
3R
D
4R
2
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
A geostationary satellite is orbiting the earth at a height of 5R above the surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a height of 2R from the surface of the earth is
A
5
B
10
C
6$$\sqrt 2 $$
D
$${6 \over {\sqrt 2 }}$$
3
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
A spherical planet has a mass MP and diameter DP. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to
A
$${{4G{M_P}} \over {D_P^2}}$$
B
$${{G{M_P}m} \over {D_P^2}}$$
C
$${{G{M_P}} \over {D_P^2}}$$
D
$${{4G{M_P}m} \over {D_P^2}}$$
4
AIPMT 2012 Prelims
MCQ (Single Correct Answer)
+4
-1
If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q?
A
$${Q \over {4\pi {R^2}\sigma }}$$
B
$${\left( {{Q \over {4\pi {R^2}\sigma }}} \right)^{ - 1/2}}$$
C
$${\left( {{{4\pi {R^2}Q} \over \sigma }} \right)^{1/4}}$$
D
$${\left( {{Q \over {4\pi {R^2}\sigma }}} \right)^{1/4}}$$
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