1
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
2
AIPMT 2014
+4
-1
A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass = 5.98 $$\times$$ 1024 kg) have to be compressed to be a black hole?
A
10$$-$$9 m
B
10$$-$$6 m
C
10$$-$$2 m
D
100 m
3
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
4
NEET 2013 (Karnataka)
+4
-1
The radius of a planet is twice the radius of earth. Both have almost equal average mass densities. VP and VE are escape velocities of the planet and the earth, respectively, then
A
VP = 1.5 VE
B
VP = 2 VE
C
VE = 3 VP
D
VE = 1.5 VP
EXAM MAP
Medical
NEET