1
AIPMT 2015
+4
-1
A remote-sensing satellite of earth revolves in a circular orbit at a height of 0.25 $$\times$$ 106 m above the surface of earth. If earth's radius is 6.38 $$\times$$ 106 m and g = 9.8 ms$$-$$2, then the orbital speed of the satellite is
A
9.13 km s$$-$$1
B
6.67 km s$$-$$1
C
7.76 km s$$-$$1
D
8.56 km s$$-$$1
2
AIPMT 2015
+4
-1
A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth. Then,
A
the linear momentum of S remains constant in magnitude.
B
the acceleration of S is always directed towards the centre of the earth.
C
the angular momentum of S about the centre of the earth changes in direction, but its magnitude remains constant.
D
the total mechanical energy of S varies periodically with time.
3
AIPMT 2015 Cancelled Paper
+4
-1
Kepler's third law states that square of period of revoluation (T) of a planet around the sun, is proportional to third power of average distance r between sun and planet i.e. T2 = Kr3 here K is constant. If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation force of attraction between them is F = $${{GMm} \over {{r^2}}}$$, here G is gravitational constant. The relation between G and K is described as
A
K = G
B
K = $${1 \over G}$$
C
GK = 4$$\pi$$2
D
GMK = 4$$\pi$$2
4
AIPMT 2014
+4
-1
Dependence of intensity of gravitational field (E) of earth with distance (r) from centre of earth is correctly represented by
A
B
C
D
EXAM MAP
Medical
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