B When a star considerably larger than our sun burns out, the gravitational force between all its particles can cause the star to collapse on itself and thereby to form a black hole. The gravitational force at the surface of such a collapsed star is so strong that neither particles nor light can escape from its surface (thus the term "black hole"). Any star coming to near a black hole can be ripped apart by strong gravitational force and pulled into the hole. So, a black hole consists of super dense planetary material.
JCECE-2003
Gravitation
138245
The force of gravitation is
1 repulsive
2 conservative
3 electrostatic
4 non-conservative
Explanation:
B The work done by force of gravitation does not depend on path taken. Hence, the force of gravitation is conservative.
AIIMS-2007
Gravitation
138246
The intensity of gravitational field inside a hollow spherical shell is
1 zero
2 $\infty$
3 maximum
4 $-\mathrm{ve}$
Explanation:
A The intensity of gravitational field inside a hollow spherical shell is zero at all points because various region of shell attracts point mass in various directions, these forces cancel each other completely.
AIIMS-2008
Gravitation
138263
Which one of the following is not a contact force?
1 Frictional force
2 Buoyant force
3 Air resistance
4 Viscous force
5 Gravitational force
Explanation:
E Non-contact force occurs due to either attraction or repulsion between two objects such that gravitational force is not contact between the objects. There is always a field linked with non-contact force. Gravitational force is an example of a non contact force.
B When a star considerably larger than our sun burns out, the gravitational force between all its particles can cause the star to collapse on itself and thereby to form a black hole. The gravitational force at the surface of such a collapsed star is so strong that neither particles nor light can escape from its surface (thus the term "black hole"). Any star coming to near a black hole can be ripped apart by strong gravitational force and pulled into the hole. So, a black hole consists of super dense planetary material.
JCECE-2003
Gravitation
138245
The force of gravitation is
1 repulsive
2 conservative
3 electrostatic
4 non-conservative
Explanation:
B The work done by force of gravitation does not depend on path taken. Hence, the force of gravitation is conservative.
AIIMS-2007
Gravitation
138246
The intensity of gravitational field inside a hollow spherical shell is
1 zero
2 $\infty$
3 maximum
4 $-\mathrm{ve}$
Explanation:
A The intensity of gravitational field inside a hollow spherical shell is zero at all points because various region of shell attracts point mass in various directions, these forces cancel each other completely.
AIIMS-2008
Gravitation
138263
Which one of the following is not a contact force?
1 Frictional force
2 Buoyant force
3 Air resistance
4 Viscous force
5 Gravitational force
Explanation:
E Non-contact force occurs due to either attraction or repulsion between two objects such that gravitational force is not contact between the objects. There is always a field linked with non-contact force. Gravitational force is an example of a non contact force.
B When a star considerably larger than our sun burns out, the gravitational force between all its particles can cause the star to collapse on itself and thereby to form a black hole. The gravitational force at the surface of such a collapsed star is so strong that neither particles nor light can escape from its surface (thus the term "black hole"). Any star coming to near a black hole can be ripped apart by strong gravitational force and pulled into the hole. So, a black hole consists of super dense planetary material.
JCECE-2003
Gravitation
138245
The force of gravitation is
1 repulsive
2 conservative
3 electrostatic
4 non-conservative
Explanation:
B The work done by force of gravitation does not depend on path taken. Hence, the force of gravitation is conservative.
AIIMS-2007
Gravitation
138246
The intensity of gravitational field inside a hollow spherical shell is
1 zero
2 $\infty$
3 maximum
4 $-\mathrm{ve}$
Explanation:
A The intensity of gravitational field inside a hollow spherical shell is zero at all points because various region of shell attracts point mass in various directions, these forces cancel each other completely.
AIIMS-2008
Gravitation
138263
Which one of the following is not a contact force?
1 Frictional force
2 Buoyant force
3 Air resistance
4 Viscous force
5 Gravitational force
Explanation:
E Non-contact force occurs due to either attraction or repulsion between two objects such that gravitational force is not contact between the objects. There is always a field linked with non-contact force. Gravitational force is an example of a non contact force.
B When a star considerably larger than our sun burns out, the gravitational force between all its particles can cause the star to collapse on itself and thereby to form a black hole. The gravitational force at the surface of such a collapsed star is so strong that neither particles nor light can escape from its surface (thus the term "black hole"). Any star coming to near a black hole can be ripped apart by strong gravitational force and pulled into the hole. So, a black hole consists of super dense planetary material.
JCECE-2003
Gravitation
138245
The force of gravitation is
1 repulsive
2 conservative
3 electrostatic
4 non-conservative
Explanation:
B The work done by force of gravitation does not depend on path taken. Hence, the force of gravitation is conservative.
AIIMS-2007
Gravitation
138246
The intensity of gravitational field inside a hollow spherical shell is
1 zero
2 $\infty$
3 maximum
4 $-\mathrm{ve}$
Explanation:
A The intensity of gravitational field inside a hollow spherical shell is zero at all points because various region of shell attracts point mass in various directions, these forces cancel each other completely.
AIIMS-2008
Gravitation
138263
Which one of the following is not a contact force?
1 Frictional force
2 Buoyant force
3 Air resistance
4 Viscous force
5 Gravitational force
Explanation:
E Non-contact force occurs due to either attraction or repulsion between two objects such that gravitational force is not contact between the objects. There is always a field linked with non-contact force. Gravitational force is an example of a non contact force.
