Physics Mcqs - Page 49 of 61

1.Area under velocity time graph represent_____________________? A. force B. displacement C. distance D. acceleration 2. Instantaneous and average velocities become equal when body___________________? A. has zero acceleration B. has uniform acceleration C. has variable acceleration D. moves in a circle 3. Inertia of an object is quantitative measure of its__________________? A. volume B. density C. mass D. temperature 4. 1st law of motion gives the definition of _________________________? A. rest B. motion C. velocity D. force 5. 3rd law of motion explains______________________? A. effect of force B. existence of a force C. existence of two forces D. existence of pair of forces in nature 6. The dimension of force is____________________? A. MLT-2 B. ML2T-2 C. ML2T2 D. ML-2T-2 7. Which of the following pair has same direction always ? A. force, displacement B. force, velocity C. force, acceleration D. force, momentum 8. The collision between two bodies be elastic if bodies are_________________? A. solid and soft B. soft and elastic C. solid and hard D. hard and elastic 9. When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to__________________? A. Centripetal force B. Gravitational force C. Their inertia D. Centrifugal force 10. What is the shape of velocity, time graph for constant acceleration ? A. straight inclined line. B. parabola C. inclined curve D. declined curve 11. Which shows the correct relation between time of flight T and maximum height H ? A. HgT2/8 B. H8T2/g C. H8g/T2 D. HgT2 12. Taking off rocket can be explained by __________________? A. 1st law of motion B. 2nd law of motion C. Law of conservation of momentum D. law of conservation of energy 13. What is the angle of projection for which the range and maximum height become equal ? A. tan-1 ¼ B. tan-1 4 C. tan-1 ½ D. tan-1 2 14. Distance covered by a freely falling body in 2 seconds will be__________________? A. 4.9 m B. 19.6 m C. 39.2 m D. 44.1 m 15. Flight of a rocket in the space is an example of______________________? A. second law of motion B. third law of motion C. first law of motion D. law of gravitation 16. At which angle the range of the projectile is maximum____________________? A. 45 B. 60 C. 30 D. none 17. Time rate of change of momentum is equal to____________________? A. force B. impulse C. velocity D. both A and C 18. Why Ballistic missile fails in some circumstances of precision ? A. due to their shape B. due to air resistance C. due to angle of projection D. all of these 19. A body is moving with uniform velocity. Its______________________? A. speed changes B. acceleration changes C. direction of motion changes D. displacement from origin changes 20. When velocity time graph is a straight line parallel to time axis then__________________? A. acceleration is const B. acceleration is variable C. acceleration is zero D. velocity is zero 21. Slope of velocity time graph is_____________________? A. acceleration B. distance C. force D. momentum 22. Which law of motion is also called law of inertia ? A. 1st law B. 2nd law C. 3rd law D. all 1st, 2nd and 3rd laws 23. Newtons laws do not hold good for particles_______________? A. at rest B. moving slowly C. move with high velocity D. move with velocity comparable to velocity of light 24. 2nd law of motion gives the definition of________________? A. force B. acceleration C. velocity D. both force and acceleration 25. Momentum depends upon__________________? A. force acts on the body B. mass of the body C. velocity of the body D. both mass and velocity of the body 26. When a body moves in a straight line then its displacement coincides with__________________? A. distance B. force C. acceleration is zero D. both A and B 27. Motorcycle safety helmet extends the time of collision hence decreasing the________________? A. chance of collision B. force acting C. velocity D. impulse 28. During long jump, athlete runs before taking the jump. By doing so he__________________? A. provide him a larger inertia B. decreases his inertia C. decreases his momentum D. increases his momentum 29. A body is falling freely under gravity. How much distance it falls during an interval of time between 1st and 2nd seconds of its motion, taking g10 ? A. 14 m B. 20 m C. 5 m D. 25 m 30. The SI unit of Heat is________? A. Watt B. Volt C. Joule D. Newton 31. Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet? A. 2.5 B. 2.0 C. 1.75 D. 1.5 E. 1.25 32. The branch of science which deals with the properties of matter and energy is called__________? A. Biology B. Geography C. Physics D. Chemistry 33. Physics is one of the branches of___________? A. Physical science B. Biological sciences C. Social science D. Life sciences branch 34. Which branch of science plays an important role in engineering? A. Biology B. Chemistry C. Physics D. All of these 35. The most fundamental of all sciences which provides basic principles and fundamental laws to other branches of science is_________? A. biology B. physics C. information technology D. chemistry 36. The Branch of Physics deals with highly energetic ions is called__________? A. Elementary articles B. Article physics C. Ionic physics D. Plasma physics 37. The__________branch of Physics deals with nuclear particles such as neutrons, protons and nuclear? A. Solid State Physics B. Plasma Physics C. structure is called D. Nuclear Physics E. Particle Physics 38. The branch of Physics which deals with properties of gravitational? A. Field theory B. Acoustics C. Hydro dynamic D. Optics 39. The branch of physics which deals with the living things is called_________? A. biological sciences B. physical sciences C. cell systems D. elementary physics 40. The physics of moving charge particles is known as__________? A. Plasma physics B. Electro-static’s C. Electro-magnetic D. Electro-dynamics 41. Study of living science relates with________? A. Physical science B. Biological science C. Just living science D. Organ science 42. The first book of Physics was written by__________? A. Kelvin B. Newton C. Aristotle D. Faraday 43. Which one of the following is mass less? A. Proton B. Electron C. Neutron D. Photon 44. Name the branch of science which deals with the study of sound and sound waves? A. Aeronautics B. Acoustics C. Aerostatics D. Aetiology 45. The formula of inter-conversion of centigrade and Fahrenheit scale is___________? A. c-32/9 B. f -32/9 c/5 C. f-32/9c/9 D. none 46. The co efficient of linear expansion is equal to__________? A. ΔL αLΔT B. ΔL/LΔT C. LΔT/ΔL D. αLΔT-ΔL 47. The unit of coefficient of linear expansion or volume expansion is__________? A. K B. K-1 C. K -2 D. none 48. linear expansion occurs in_________? A. Solid B. liquid C. both D. none 49. When body is in motion, ____________ always changes? A. its velocity B. its acceleration C. its position vector D. its momentum 50. A man is in a car is moving with velocity of 36km/hr. His speed with respect to the car is ____________________? A. 10m/s B. 36m/s C. zero D. infinite 51. When two bodies move toward each other with constant speeds the distance between them decreases at the rate of 6m / sec. If they move in the same direction the distance between them increases at the rate of 4m/sec. Then their speeds are________________? A. 5m/s, 1m/s B. 3m/s, 3m/s C. 6m/s, 1m/s D. 4m/s, 2m/s 52. The distance covered by a body in time t starting from rest is__________________? A. at2/2 B. Vt C. a2t/2 D. at2 53. The trajectory (or path) of a projectile is_________________? A. straight line B. parabola C. hyperbola D. circle 54. The force beared by a wall on which water strikes normally at a speed of 10m/sec and at a discharge of 0.0001m3/sec is__________________? A. 1 N B. 10 N C. 100 N D. none 55. The range of the projectile at 30 deg and 60 deg are__________________? A. equal to 45 deg B. equal to 90 deg C. equal to each other D. none of the above 56. Waves transmit ________________ from one place to another? A. energy B. mass C. both D. none 57. When collision between the bodies in a system is inelastic in nature then for system ____________________? A. momentum changes but K.E remain conserve B. K.E changes but momentum remain conserve C. both momentum and K.E changes D. both momentum and K.E remain conserve 58. The acceleration in the rocket at any instant is proportional to the nth power of the velocity of the expelled gases. Where the value of n must be ? A. -1 B. 1 C. 2 D. -2 59. Which of the following is not an example of projectile motion ? A. a gas filled balloon B. bullet fired from gun C. a football kicked D. a base ball shot 60. The thrust on the rocket in the absence of gravitational force of attraction is__________________? A. Constant B. not constant C. constant if the rate of ejected gases is constant D. constant for short range rocket.

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