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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

Link Type comphrehension( Q2-Q4)
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
Link Type comphrehension( Q11-Q12)
A ball is thrown vertically upwards with a velocity of 49 m/s.
g=9.8 m/s2 11. Calculate the max height it rises up to?
  • 112.5m
  • 245m
  • 122.5m
  • none of thes

12. Calculate the total time it takes to reach back to surface?
  • 20 sec
  • 15sec
  • 5 sec
  • 10sec

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