www.testMHTCET.com Physics-I Marks : 300 1) Questions : 250 - Time : 2Hrs g The height of a communication satellite. g, ) 35850 km b. 3585 km a. c. 358.5 km d. 35.85 km 2) The radius of earth is , its mean density - g d he g i i constant is potential of the earth surface is, a. b. g . The gravitational g g c. g d. g 3) A satellite in a circular of the earth has a K.E. . What is the minimum amount of energy to be added so that it escapes from the earth? b. c. d. a. 4) The earth is to be considered as a homogeneous solid sphere. Scientist A goes deep down in mine and scientist B goes high up in a balloon. The value of g measured by A goes on decreasing and that by B goes on increasing b. B goes on decreasing and that by A goes on increasing c. Each decreases at the same rate d. a. Each decreases different rates 5) Parking orbit is the orbit in which the satellite and earth have equal: a. Acceleration b. Velocity c. Angular velocity d. Relative velocit 6) An iron ball and wooden ball of the same radius were released from height h in vacuum. Time taken by both of these to reach the ground will be: www.midasinfotouch.org Page 1 www.testMHTCET.com Physics-I Marks : 300 a. Unequal, iron ball reach earlier b. Questions : 250 Unequal, wooden ball reach earlier c. Exactly equal Time : 2Hrs d. Roughly equal 7) For geostationary satellite a. Time period depends on mass of satellite b. The orbital radius does not depends on mass of the earth c. The period is equal to that of the rotation of the earth about its axis d. The period is eq that of the revo of earth around sun 8) Weight of body at the centre of earth is: a. Zero b. 9.8 mg c. Infinity d. Mg 9) Ratio of gravitational force acting on body at height 1600 km to gravitational force c i g he s e b dy e h’s su f ce 5:4 b. 25:16 c. 4:5 d. 16:25 a. 10) If a body is taken from a deep mine to a point at certain height above the ground, its weight Decreases b. Increases c. Increases up to the surface of the earth and then decreases d. Remains same a. 11) A man inside an artificial satellite feels weightlessness because the force of attraction due to earth on him is Zero at that place b. Equal to the necessary centripetal c. Balanced by the force of repulsion d. Infinite a. www.midasinfotouch.org Page 2 www.testMHTCET.com Physics-I Marks : 300 Questions : 250 force Time : 2Hrs 12) Distance of a planet from the earth is and the gravitational force between them is mass of the planet and that of earth is equal , each being g The universal constant of gravitation is ( 6400 km) b. gc. d. a. g dy e c g dy 13) An artificial satellite stays in the orbit around the earth because a. h’s ci it is balanced by the attraction of the planets b. The fuel in the satellite burns and releases hot gases which produce thrust c. h’s ci d. it is just balanced by the viscous force on it produced by the atmosphere h’s ci in produces necessary centr force 14) It is advantageous to launch space ship rockets a. From east to west in the equatorial plane b. From west to east in the equatorial plane c. From north to south in any direction d. From south to n in any direction 15) A physical balance is used to measure: a. Weight b. Gravity c. Inertial mass d. Gravitational m 16) The plane of the orbit of an earth satellite: a. Passes through the centre of the earth b. Does not pass through the centre of the earth c. May or may not pass through the centre of the earth d. Oscillates abou centre of the ea www.midasinfotouch.org Page 3 www.testMHTCET.com Physics-I Marks : 300 Questions : 250 Time : 2Hrs 17) The values of the acceleration of free fall g on the surface of two planets are the same provided that the planets have the same ratio of: Mass b. Mass/Radius c. Radius d. Mass/ dius a. 18) Two satellites A and B go round a planet in circular orbits having radii 4 r and r respectively. If speed of satellite A is 3 v the speed of satellite B will be: 12v b. 6v c. d. a. 19) An object weights W newton on earth. It is suspended from the lower end of a spring balance whose upper end is fixed to the ceiling of a space capsule in a stable orbit around the earth. The reading of the spring balance will be W b. Less than W c. More than W d. Zero a. 20) A satellite launch station should be a. Near the equatorial region b. Near the polar region c. On the polar axis d. All the location equally good 21) What would be the duration of the year, if the distance between the earth and the sun gets doubled? 365 day b. 556 day c. 1032 day d. 129 day a. 22) An earth satellite is moved from one stable circular orbit, which one of the following quantities increase? www.midasinfotouch.org Page 4 www.testMHTCET.com Physics-I Marks : 300 a. Gravitational force b. Questions : 250 Gravitational potential energy c. Time : 2Hrs Linear orbital speed d. Centripetal acceleration 23) If g is he cce e i due g i y heigh h b e he e h’s su f ce d is the radius of the earth then, the critical velocity of a satellite revolving round the earth in a circular orbit at a height h is equal to b. c. √ g d. √ g a. √ g h √g h h h 24) An object weights W newton on earth. It is suspended from the lower end of a spring balance whose upper end is fixed to the ceiling of a space capsule in a stable orbit around the earth. The reading of the spring balance will be W b. Less than W c. More than W d. Zero a. 25) The distance between center of the earth and moon is 384000 km. if the mass of the earth is 6×1024 kg and G=6.66×10-11 Nm2/kg2, the speed of the moon is nearly 1 km/s b. 4 km/s c. 8 km/s d. 11.2 km/s a. 26) A physical balance is used to measure: a. Weight b. Gravity c. Inertial mass d. Gravitational m 27) Two point masses 2kg each separated by 2 m from each other, experiences how much greater force in compare to two point masses 1 kg of each separated at 1 m. apart: Equal b. 2 time the first c. 1/2 of the first d. a. 4 times the firs www.midasinfotouch.org Page 5 www.testMHTCET.com Physics-I Marks : 300 Questions : 250 Time : 2Hrs 28) The earth (mass =6.1024kg) revolves round the sun with an angular velocity of 2×107 rad/s in a circular orbit of radius 1.5 ×108 km in a circular orbit of radius 1.5×108 km the gravitational force exerted by the sun in the earth, in Newton, is Zero b. 18×1025 c. 36×1021 d. 3.6×1018 a. 29) Which of the following has nothing to do (independent) with mass of the earth: a. Orbital velocity b. Escape velocity c. Gravitational intensity (g) d. Universal gravitational constant 30) The escape velocity of a body from the surface of a planet is , If radius of the planet is 1100 km and acceleration due to gravity on the surface of the planet is 1.6 m/s2 b. c. d. a. s s s s 31) The mass of a body at the centre of the earth is a. Infinite b. Zero c. Same as at other places d. Greater at pole 32) If the horizontal velocity given to the satellite is equal to critical velocity, then the satellite performs Circular path b. Elliptical path c. Parabolic path d. Tangent to the path a. 33) A satellite is in circular orbit 140 km above the planet. If the radius of planet is 5760 he g i i f ce s e i e c p ed wi h h whe i is he p e ’s Page 6 www.midasinfotouch.org www.testMHTCET.com Physics-I Marks : 300 surface is approximately less by a. 95 % b. Questions : 250 Time : 2Hrs 5 % c. 100 % d. 10 % 34) Gravitational force between two bodies each of mass 1 kg separated by a distance 1 m is: Zero b. c. d. a. 35) If a satellite is orbiting the earth very close to its surface, then the orbital velocity mainly depends on The mass of the satellite only b. The radius of the earth only c. The orbital radius only d. a. The mass of the only 36) A physical balance is used to measure: a. Weight b. Gravity c. Inertial mass d. Gravitational m 37) The acceleration due to gravity on the earth of radius Re is ge and that on the moon of radius Rm is gm. The ratio of the masses of the earth and the moon is given by b. √ c. d. a. 38) The acceleration due to gravity on the surface of the moon . Given that the mass of the moon is 1/80 times that of the earth and the diameter of the moon is ¼ times that of the earth (g= 9.8 m/S2 www.midasinfotouch.org Page 7 www.testMHTCET.com Physics-I Marks : 300 a. 19.6 m/S2 b. Questions : 250 19.6 km/S2 c. 1.96 m/S2 Time : 2Hrs d. 1.96 m/S2 39) If a missile is launched with a velocity less than the escape velocity, then the sum of its kinetic and potential energy will be Positive b. Negative c. Zero d. a. May be positive negative depen upon its initial velocity 40) In some region, the gravitational field is zero. Then gravitational potential at that region Must be zero b. Cannot be zero c. Must be constant d. Can no judge a. 41) During a journey from earth to the moon and back the greatest energy required for the space ship rocket is to over come The e h’s g take off iy b. The ’s g lunar landing iy c. The ’s g lunar take off iy d. a. The force at the where the pull earth and moon equal and oppo 42) The height of a satellite from the surface of the earth whose critical velocity 5 km / s . is - g b. 9608 cm g, c. ) 9608 mm d. 9608 km a. 9608m 43) When the planet comes nearer the sun moves: www.midasinfotouch.org Page 8 www.testMHTCET.com Physics-I Marks : 300 a. Fast b. Questions : 250 Slow c. Time : 2Hrs Constant at any point d. Slow at every p 44) What will be weight of the body of mass 10 kg at the center of earth? a. Zero b. 98 N c. Infinite d. 49 N 45) The acceleration due to gravity (on earth) depends upon: a. Size of the body b. Gravitational mass of the body c. Gravitational mass of the earth d. None of the abo factors 46) C.G.S. unit of gravitational field intensity is a. Dyne/gr b. cm-s2 c. S2/cm d. Gram/dines 47) The speed at which a satellite can move in a stable circular orbit round the earth is , - g b. 7.9 km/S g, c. ) 7.9 mm/S d. 7.9 cm/s a. 7.9 m/s 48) A satellite is orbiting the earth in a circular orbit of radius r. The following statements are correct Kinetic energy varies as 1/r b. Angular momentum varies as √ c. Linear momentum varies as √ d. a. Frequency of revolution vari 49) A physical quantity having a ratio of between its SI units and CGS units is: Page 9 www.midasinfotouch.org www.testMHTCET.com Physics-I Marks : 300 Questions : 250 Time : 2Hrs a. Gravitational constant b. Acceleration due to gravity c. Force d. Gravitational potential 50) The gravitational force with which the earth attracts the moon: a. Is less than the force with which the moon attracts the earth b. Is equal to the force with which the moon attracts the earth c. Is greater than the force with which he moon attracts the earth d. Varies with the phases of moon www.midasinfotouch.org Page 10