Science Mcqs
Q 1. One newton=______Dynes?
• 10 -4
• 10 +8
• *10*
• 10 -9
Q . Momentum depends upon_____?
• Force
• Acceleration
• Velocity
• *Mass*
Q 3. In Si system the unit of power is ____?
• Newton's v
• *Watt*
• Farad
• Dynes
Q 4. Which scientist introduced the relationship between current voltage and resistance?
• *Ohm's*
• Hook 's
• Newton's
• Pascal's
Q 5. The unit of density in MKS system is___?
• meter/cm
• Cubic cm
• Meter
• *cubic meter*
Q 6. The unit of work is ____?
• Pascal's
• Farad
• *Joule*
• Wat
Q 7. Force of attraction or repulsion between the charged bodies is directly proportional to their_____of the charges?
• Sum
• Square
• *Product*
• Multiple
Q 8. Torque_______?
• Fa
• Ma
• Fm
• *Fd*
Q 9. The unit of pressure is called_____?
• *NM3*
• A
• FD
• NM
Q 10. Electrons have negative charge and its mass is_____?
• 6.67x10 27
• *9.1x10-³¹*
• 9x10
• 3x10 "
Q 11. The unit of torque is _______?
• FD
• NM2
• *NM*
• MA
Q 12. Stress = ____?
• Original lengthincrease in length.
• *increase in length/original length*
• None
• Strain
Q 13. Voltmeter is used for_____ ?
• Resistance
• *Ohm*
• voltage
• Current
Q 14. The unit of charge is ____?
• Capacitance
• Joule
• *Coulombs*
• Farad
Q 15. In law of gravitation F=______?
• *GMem/r2*
• GMeMr2
• GMem/r
• gMEM/r2
Q 16. The instrument used to measure pressure is called____?
• Ammeter
• *Barometer*
• Voltmeter
• Manometer
Q 17. The unit of charge is equal to_________coulombs?
• 6.25'10 +19
• 7.25 10 16
• 6.25'10 -18
• *6.25 x10*18*
Q . In friction F2 =___- ?
• Voltage
• Ohm
• Current
• *UR*
Q 19. Young modulus Y=_____?
• Stress
• strain'stress
• Strain
• *stress/strain*
Q 20. Snow floats over water its reason is- -?
• Equal weight
• Equal volume
• *Less density*
• Equal density
Q 21. The relationship between stress and strain was introduced by____?
• Newton's
• Hook's
• None
• *Young modulus*
Q 22. In mass of earth Me= ____?
• G2 r/G
• *Gr2/g*
• Gr2/g
• Gr/G2
Q 23. The process of distribution of light into seven colors is called___of light?
• Refraction
• Respiration
• *Dispersion*
• Reflection
Q 24. Bloons flies in air its reason is____?
• Equal weight
• Lightness
• *Less density*
• Heavwy
Q 25. The original length and increase in length is called____law?
• Newton's
• Young modulus
• *Hook's*
• Ampere's
Q 26. A pencil is an example of-equilibrium?
• Neutral
• None
• *Unstable*
• Stable
Q 27. In air velocity of sound is?
• 4500
• *None*
• 3400
• 3695
Q 28. The speed of light is ?
• 4*10 5
• *3*10 8*
• 3*10 8
• 2*10 8
Q 29. If a body of mass "m" is attached with a rope then this is-law?
• Pascal's
• Ohm
• *Newton's*
• Momentum
Q 30 . Hydrogen has ______isotopes?
• Four
• One
• *Three*
• Two
Q 31. The unit of stress is ?
• Nm
• *Nm –²*
• Nm 1
• Nm 2
Q 32. The centrifugal force is inversely proportional to_____?
• Mass
• Velocity
• Centripetal
• *Radius*
Q 33. To move entire earth said by______?
• Ohm's
• *Archimedes*
• Newton's
• Oersted
Q 34. Boyles law=_____?
• PVT
• NRT
• P1V1T1
• *PV*
Q 35. The magnetic lines are greater on_____side?
• *Outer*
• Surface
• None
• hner
Q 36.Doctor Abdul slam got noble prize in____?
• 1980
• 1992
• *1979*
• 1962
Q 37. If a 100 kg weight is thrown in upward direction then on coming down side its weight side its weight will be____?
• Increase
• 4 kg
• 100 kg
• *Same*
Q 38. To lift the heavy cars____is used ?
• Inclined plane
• Liver
• *Screw jack*
• None
Q 39 .If 1000 joule of a body is dropped from height then what will be its velocity on coming down?
• 100
*• 0*
• None
• 1000
Q 40. If the distance of one body from another body will be twice the force of gravitation will be_____?
• *1/4*
• 1/2
• Fourth
• Double
Q 41. In dry cell the charging of emf is___?
• 1V
• 2V
• *1.5V*
• 2.5V
Q 42. The strong magnet less attracts__?
• Paramagnetic
• *Ferromagnetic*
• Electromagnetic.
• Diamagnetic
Q 43. In three states of matter in which the attraction of molecules is lesser?
• *Gas*
• Liquid
• Solid
• None
Q 44. The moving wheel of a car is an example of___motion ?
• *None*
• Vibrational
• Transnational
• Wave
Q 45____-molecules have greater distance ?
• Solid
• None
• Liquid
• *Gas*
Q 46. The ratio of force and weight is called ____?
• Inclined plane
• Momentum
• *Mechanical advantage*
• Efficiency
Q 47. If we add all the 7 colors of rainbow (red, yellow, blue, green, orange, violet and indigo), the resultant color would be ?
• White
• Black
• Maroon
• Dark Blue
Q 48. When white light passes through a prism, it splits into____colors.
• 5
*• 6*
• 7
• 8
Q 49. A camera uses a______ to form an image on a piece of film at the back.
• *convex lens*
• concave lens
• diverging lens
• none of these
Q 50. Short-sight defect couid be corrected by a ____
• convex lens
• *concave lens*
• converging lens
• none of these
Q 51. Red + Green + Blue = ?
• *White*
Q 52. Electron volt is a unit of?
• Power
• Momentum
• *Energy*
• Work
Q 53 . Two different gases having equal volumes at the same temperature and pressure will contain?
• Different number of molecules
• Atoms but not molecules
• *Same number of molecules*
• Number of molecules according to their densities
Q 54. The instantaneous and average velocities of a body are equal, the body is?
• Not moving at all
• None of above
• *Moving with a constant velocity*
• Placed in a moving bus
Q 55. Maxwell's hypothesis suggests that a changing electric field gives rise to?
• *A magnetic field*
• another electric field
• An e.m.f
• A changing resistance
Q 56. A shunt resistance parallel to the galvanometer is used to convert it into a ? Quiz
• A vometer
• Voltmeter
• *Mille-ammeter*
• Multimeter.
Q 57. An atom emits a beta-particle from its?
• Inner shells
• Any of the shells depending upon its energy
• *Nucleus*
• Outer shells
Q 58. The magnitude of the resultant of two forces may be increased by ?
• Drawing a parallelogram to represent them.
• None of the above.
• *Decreasing the angle between them*
• Increasing the angle between them.
Q 59. When two tuning forks of nearly the same frequencies are sounded, the beats produced?
• Travel with a velocity less than that of sound
• *Travel with the velocity of sound*
• Travel with a velocity greater than that of sound
• Do not travel at all as they are stationary
Q 60. A stone is being whirled at the end of a string in form of avertical circle. The string of breaks is likely to carry the stone?
• At any point
• At a fixed point
• At the highest point
*• At the lowest point*
Q 61. The variation in focal length of a lens at its edges is called?
• Coma
• Chromatic aberration
• *Spherical aberration*
• Astigmatism
Q 62. If X- Rays are passed through successive aluminum sheets, their hardness?
• Increase
• *Remains unaffected*
• Varies
• Decreases
Q 63. When the mass and speed of a body are doubled the KE becomes?
• 16 Times
• 3 Times
• 4 Times
*• 8 Times*
Q 64. An astronaut in space working outside his spaceship is attached to the ship with a belt. If the belt is cut?
• He will go to the outer space
• None of the above
• *He will continue moving in the orbit*
• He will fall towards earth
Q 65. An electron of Hydrogen atom jumps from higher orbit into fifth orbit, the line spectrum emitted will be in?
• Pfund series
• *Lyman series*
• Bracket series
• Paschen series
Q 66. The mean color of the spectrum is?
• Blue
• *Green*
• Violet
• Yellow
Q 67. Which of the following quantities is a vector quantity?
• Mass
• *None of these*
• Time
• Length
Q 68. According to special theory of relativity, space and time have?
• Absolute meaning
• Conceptual meaning
• *Relative meaning*
• Selective meaning
Q 69. A convex lens of focal length 'f'is immersed in a liquid of refractive index less than that of lens material, its focal length?
• None of these
• Remains unchanged
• Decreases
• *Increase*
Q 70. When a gas is compressed?
• Its temperature decreases
• Its temperature remains unchanged
• None of these
• *Its temperature increases*
Q 71.The resistance of a potentiometer must be kept high?
• To compare e.m.f
• *To compare the potential difference*
• To compare current
• To compare charges
Q 72. When a torque acting on a system is zero, which of the following will be constant?
• Linear impulse
• Linear momentum
• *Angular momentum*
• Forces
Q 73. A junction diode when forward biased behaves as a evice of?
• Infinite resistance
• High resistance
• Zero resistance
• *Low resistance*
Q 74. Due to the sudden burst of an inflated Tyre, the temperature of air inside the Tyre?
• Increase
• Remains constant
• Decreases
Q 75. Which of the following suggests that light waves are transverse in nature?
• Interference
• All of above
• Diffraction
• *Polarization*
Q 76. Inertia of a body is measured in terms of its?
• *Mass*
• Weight
• Velocity
Q 77.Ozone layer protects the Earth from ____radiations from the Sun.
• microwaves
• infrared
• X-rays
• *ultraviolet*
Q 78. The distance of Moon from the Earth is________Km?
• 364,000
• *384,000*
• 464,000
• 484,000
Q 79. There are _____planets in orbit around the Sun.
• 6
• 7
*• 8*
• 9
Q 80. Planets are kept in orbit by the?
• Attraction among the Planets
• Attraction among the Planets and the Sun
• Radiations from the Sun
• *Gravitational pull of the Sun.*
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