Test Series-23

## Instructions

• Your test contains 12 multiple choice questions with only one answer
• This is 30 min test.Please make sure you complete it in stipulated time
• You can Finish this test any time using 'Submit' button.
• Once finished you get a chance to review all question with correct answers and their solutions.

1.What value of G in the formula of Gravitational force ?
• depends on radius of earth
• depends on radius of earth and mass of the earth
• depends neither on radius of earth and mass of the earth
• depends on mass of earth

Two objects A and B are of mass m1 and m2 are seperated by the distance r. The Gravitational force between the objects is F
2) What will be Gravitational Force between the two objects if the mass of the one object is doubled
• F/4
• 2F
• F/2
• 4F

3. What will be Gravitational Force between the two objects if distance is increased two times? ?
• F/4
• 2F
• F/2
• 4F

4.What will be Gravitational Force between the two objects if distance is increased two times and both the masses are doubled?
• F/4
• 2F
• F/2
• F

5.which is these are the laws of Kepler? Given : Charge on electron=1.6X10-19 coulombs
• The cube of the mean distance of a planet from the sun is directly proportional to the square of time it takes to move around the sun
• Each planet revolves around the sun in such a way that the line joining the planet to the sun sweeps over equal areas in equal interval of time
• The planets move in the elliptical orbits around the sun with sun situated on one of the foci of the elliptical orbit
• All the above

6. What is true of g?
• it is vector quantity and has unit m/s2
• it is scalar quantity and has unit m/s2
• it is vector quantity and has unit m/s
• it is scalar quantity and has unit m/s

7. The value of g at three places A,B,C which are above the surface of the earth are in the following order A > B > C what can be said about the distance of these places from the surface of the earth
• A > B > C
• A=B=C
• C> B> A
• None of the above

8. There are two statements A The weight of the body is not constant and it changes with acceleration due to gravity B The mass of the objects can never be zerp Which one of the following is correct?
• A only
• B only
• Both A and B are correct
• Both A and B are wrong

9.Two bodies fall from the same height on the surface of the earth ? Which body will strike the surface first
• Heavier body
• lighter body
• Both will reach same at the same time
• none of these

10.Why will a sheet of paper fall slower than one that is crumpled into a ball?
• The sheet of paper expeirence more air resistance then crumpled one
• The crumpled one will have more gravitional force then sheet of paper
• None of these