English
Karnataka Board PUCPUC Science Class 11

We can shield a charge from electric fields by putting it inside a hollow conductor.

Advertisements
Advertisements

Question

We can shield a charge from electric fields by putting it inside a hollow conductor. Can we shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means?

Short/Brief Note
Advertisements

Solution

A body cannot be shielded from the gravitational influence of nearby matter, because gravitational force between two point mass bodies is independent of the intervening medium between them.

It is due to the above reason, we cannot shield a body from the gravitational influence of nearby matter by putting it either inside a hollow sphere or by some other means.

shaalaa.com
  Is there an error in this question or solution?
Chapter 8: Gravitation - Exercises [Page 61]

APPEARS IN

NCERT Exemplar Physics [English] Class 11
Chapter 8 Gravitation
Exercises | Q 8.23 | Page 61

RELATED QUESTIONS

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.


What happens to the force between two objects, if the mass of one object is doubled?


What happens to the force between two objects, if the distance between the objects is doubled and tripled?


The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the direction indicated by the arrow (see Fig 8.12) (i) a, (ii) b, (iii) c, (iv) 0.


How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 × 108 km.


State Kepler’s law which is represented by the relation r3 ∝ T2.


Suppose the gravitational potential due to a small system is k/r2 at a distance r from it. What will be the gravitational field? Can you think of any such system? What happens if there were negative masses?


A body is suspended from a spring balance kept in a satellite. The reading of the balance is W1 when the satellite goes in an orbit of radius R and is W2 when it goes in an orbit of radius 2 −R.


Two spherical balls of mass 10 kg each are placed 10 cm apart. Find the gravitational force of attraction between them.


Two concentric spherical shells have masses M1, M2 and radii R1, R2 (R1 < R2). What is the force exerted by this system on a particle of mass m1 if it is placed at a distance (R1+ R2)/2 from the centre?


A tunnel is dug along a diameter of the earth. Find the force on a particle of mass m placed in the tunnel at a distance x from the centre.


A uniform metal sphere of radius a and mass M is surrounded by a thin uniform spherical shell of equal mass and radius 4a (In the following figure). The centre of the shell falls on the surface of the inner sphere. Find the gravitational field at the points P1 and P2 shown in the figure.


A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 ms-2 , find : 
the total time of journey of the ball .


Gravity is another kind of ________. It exerts all through the ________. The Sun's gravity keeps the ___________ in their orbits. Gravity can only be felt with very large ________.


To project the rockets which of the following principle(s) is /(are) required?


State the universal law of gravitation and derive its mathematical expression.


Choose the wrong option.


Molecules in air in the atmosphere are attracted by gravitational force of the earth. Explain why all of them do not fall into the earth just like an apple falling from a tree.


For an object outside a uniform solid sphere, from where is the sphere's mass considered to act?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×