Science،Important question

 

Science،Important question

Q 1. The light reaches on earth from sun through-?

• Retardation 

• *Radiation* 

• Conduction

• Vibration

Q 2. Between tow electric charges, force is directly proportional-?

• *Product of their charges* 

• Square of distance between them

• Product between masses

• Distance between them

Q 3. The increase in temperature of a body in unit mass up to 1c0 is called-?

 •*Specific heat* 

• Latent hat of fusion

• Latent heat of evaporation 

• External heat capacity

Q 4. When a body is placed between convex mirror and its focus point then its image will be-- ?   

 • Smaller

•  *Real & inverted* 

• Virtual

• Real

Q 5. In any circuit current is directly proportional to-??

• Length of wire

• Area of wire

• Resistance

• *Potential difference* 

Q 6. The ray falling on the center of mirror passes through-?

• *Parallel* 

• Focus

• Focal length

• Normal

Q 7. Limiting friction is always____then rolling friction?

• *Less than* 

• Coefficient

• Equal to 

• Greater

Q 8. The potential energy of a body changes-?

• Directly with mass and inversely with height.

• *Directly with both mass and height* 

• Diversely with mass and directly with height

• None of these

Q 9. Total internal reflection takes place when-?

• Trough

• Crest

• *Periodic* 

• Longitudinal

Q 10. Density of water is max at- ?

• 100

 *4* 

• Absolute zero

• 0

Q 11. According to newton's second law-____and force is directly proportional?

• Distance

 *Acceleration* 

• Velocity

• Speed

Q 12. Turning effect of a body is called-??

• Speed

• Force

• Velocitya

 *Torque* 

Q 13. Whenever a piece of magnet is cut into pieces its one end becomes north pole other --?

end becomes--- --?

• North pole

 *South pole* 

• East pole

• West pole

Q 14. The rate of flow of charge through a conductor is called-?

• Ampere

• Voltage

 *Current* 

• Watt

Q 15. In a reflection ray angle of incidence is____ to the angle of reflection.?

 *Equal* 

• Opposite

• Multiple

• Sum

Q 16. If we want to calculate the correct value of length up to 0.0 cm then we will use- ?

• None 

 *Vernierkaliper* 

• Voltmeter

• Galvanometer

Q 17. If a pencil is dropped in water it bends in ____ direction?

• None

• Outward

• Outside

• *Inside* 

Q 18. Longitudinal waves consists on___?

 • Crest and trough

  *None* 

• Crest

• Trough

Q 19. The relationship between stress and strain is called___law?

• Coulomb's

• Hook's

• Ampere's

 *Young modulus* 

Q 20. Density of water is min at- ?

 *100* 

• 4

• 0

• Absolute zero

Q 21. Mechanical advantage of machine is called- 

• Output

• *Output/input* 

• Input/output

• Input

Q 22. Seesaw is ____ kind of liver?

• None

• Second

• *First* 

• Third

Q 23. Time period of simple pendulum increases by increasing___?

• Mass

• *Length* 

• Mass/length

• Frequency

Q 24. _____is one of importance example of resonance?

 *Swing*

 • Ammeter

 • Voltmeter

 • Ampere

Q 25. Sl system unit of power is- ?

• Joule

•  *Watt* 

• Volt

• Ampere

Q 26. Which one of the following is a vector quantity?

• Mass

• Density

• Work

 *Weight* 

Q 27. In parallel plate capacitor capacity depends upon?

• Charge

• Mass

• Insulator

• *Central distance* 

Q 28. Laser is a____ part of physics?

 *Atomic*

 • None

• Chemical

• Mathematical

Q.29  The work done due to motion of body is called-?

• Total work

• Wat

• Power

• *Energy* 

Q 30. In magnet opposite poles of a magnet_____each other?

• Conduct

• Interact

• *Attract* 

• Repel

Q 31. Which of the following statement is true?

• At= Vi – VF

• T= VF+VVa

 *At= VF - VI* 

• At= -Vi – VF

Q 32. The density of a body depends upon____of body?

• Speed

• Volume

• Molecule structure

• *Mass* 

Q 33. The value of g is___?

• *9.8 m/sec2* 

• 9.8/sec

• 9.8 m2/sec2

• 9.8 m/sec3

Q 34. The motion which is repeated in periods is called ____?

• Enter from denser medium to rare medium

• None of these

• Greater than critical angle

• *Less than critical angle* 

Q 35. When a body goes up with 2g acceleration then ____?

• Double the acceleration of body

• *Double the length of body* 

• Double the mass of body

• Double the velocity of body.

Q 36. The strength of a magnet depends upon____?

• Length of coil

• *Both a&b* 

• No.of turns of coil

• Current through coil

Q 37. When tow planets____then the gravitational attraction becomes greater?

• Turn into another galaxy • Move apart

• Colide together

• *Move closer* 

Q 38. Transistor consists on_____junction?

• NPN

• PNP

• Rectifier

• *Both a&b* 

Q 39. If a body is dropped from_____it meets the ground  3sec? -?

• 19

• 25

• *44.1* 

• 100

Q 40. The work of a body is equal to the product of____?

• Mass and acceleration

• Velocity and time

• Force and displacement • Mass and velocity

Q 41. Beta rays consists on

• Beta rays

• *Negatively charged in vacuum* 

• Positively charged in vacuum

• Gamma rays.

Q 42. The density of body is increased by___?

• increase in its specific area

• Decreasing its mass

• increasing its mass

• Increasing its velocity

Q 43. The ratio of output and input is called? 

•  *Efficiency* 

• Power

• Velocity

• Mechanical advantage Q 44. A body moving in constant acceleration- ?

•  *Overs equal distance in equal intervals of time* 

• Change in velocity in length

• Remains in constant speed

• hcrease in instantaneous velocity.

Q 45. If we do below the center of gravity of body then it is____ equilibrium?

• Neutral

• Temporary

• *Stable* 

• Unstable

Q 46. In parallel circuit resistances-?

•  Equal to sum of current  *Equal to sum of resistance* 

• Equal to sum of voltage  • Less than resistance

Q 47. The pitch depends upon___?

•  *Frequency* 

• Echo

• Speed

• Amplitude.

Q 48. The rainbow is a result of-___?

• Diffraction

• nterference

• *Refection* 

• Refraction.

Q 49. The centripetal force of a body in a circle is increased by- ?

• Decrease in centripetal • ncrease in its length

•  *Increase in its mass.* 

• Decrease in speed.

Q 50. When a bus suddenly stop due to-man receives an impulse in forward direction?

• Ilness

• Third law of motion

•  *Law of inertia Second*

 • law of motion

Q 51. The rate of change of velocity is called____?

•  *Acceleration* 

• Displacement

• Speed

• Average velocity

Q 52. Velocity is ____ quantity?

• *Derived* 

• None

• Basic

• Fundamental

Q 53. Every action have reaction it is ____ law?

• *Third* 

• 1st

• None

• Second

Q 54. The unit of work is same as the unit of___is?

 • *Energy* 

• Joule

• Pressure

• Velocity

 Q 55. The attraction of moon is___than the earth?

• 9*10

• *None* 

• 3*10

• 3*10.2

Q 56. The force acting on a unit-___is called pressure?

• *Area* 

• Length

• Mass

• Volume

Q 57_____ is sensitive instrument which represents the presence of current?

• Kilorimeter

• Ammeter

• Potentiometer

• *Galvanometer*

Q 58. In prism one angle is 90 degree and other are_____?

• *45 Degree* 

• 30 Degree

• 120 Degree

• 60 Degree

Q 59. Which colour is not in rainbow?

• Orange

• *Brown* 

• Red

• Yellow

Q 60. N type materials consists of ___?

• Neutrons

• *Electrons* 

• Holes

• Positrons

Q 61. Kinetic energy depends upon___?

• Mass and Speed

• Speed and Density

•  *Mass and Velocity* 

• Velocity and Density

Q 62. Volume is a_____quantity?

•  *Scalar* 

• Vectors

• Both a&b

• None

Q 63. Displacement is ___quantity?

• Physical

• Chemical

• Scalar

• *Vector* 

Q 64. The density of a body depends upon___?

• Volume

• Force

• Radius

• *Mass* 

Q 65. The quantities for which to detemine their value we have to know their magnitude and direction are called____quantities?

• Scalar

• Force

• Watt

• *Vectors* 

Q 66. Derived units have____kinds?

• 5

• 8

• *7* 

• 4

Q 67. Matter is made up of tiny particles and it is called ?

• *Atoms* 

• Molecules

• Protons

Electrons.

Q 68. The freezing point of water at kelvin degree centrigrate is___?

• 212

• *273* 

• 746

• 743

Q 69. The same poles of a magnet___each other?

• *Repel* 

• Attract

• Pull

• Push

Q 70. The bodies floating over water are due to ____law?

• Mosel's

• Pascal's

• Newton's

• *Archimedes* 

Q 71. Refractive telescope consists of------lenses?

• Concave lense

• Convex lense

• Double concave lense

• *Double convex lense*

Q 72. One horse power= ?

• *746* 

• 212

• 273

• 743

Q 73. Force is directly proportional to____?

• Mass 

• *Acceleration* 

• Speed

• Velocity

Q 74. Frequency is reciprocal to ____?

• Temperature

• Amplitude

• Heat

• *Time period*

Q  75. The distance between two bodies is called____?

• Dispersion

• Speed

• *Displacement* 

• Velocity

Q 76. The waves in which the particle vibrates as waves are called____?

• Crest

• Longitudinal

• *Transverse waves* 

• Through

Q 77. Rubber glass plastic are good___?

• Extrinsic semiconductors

• Conductors

• *Insulators* 

• Semiconductors

Q 78. The number of vibrations in unit time is called_____?

• None

• Wave length

• *Frequency* 

• Time period

Q 79. The floating of a ship on the surface of sea is due to ____law?

• *Archimedes* 

• Newton's

• Pascaľ's

• Hook's

Q 80. The rate of change of displacement is called____?

• Uniform velocity

• Speed

• Acceleration

• *Velocity*

 Q 81. A astronomical telescope consists of____points?

• One

• hfinite

• Three

• *Two* 

Q 82. Vector have _____components?

• Horizontal

• Vertical

• *Both a&b* 

• Rectangular

Q 83. The sum of neutrons and protons in a nucleus are called____?

• *Mass no* 

• Avogadro no

• Whole no

• Atomic no

Q 84. One of the example of sound waves is____?

• *Radio waves*

• Keyboard

• Television

• None

Q 85. The sum of all applied torques is zero it is_____law of equilibrium?

• 1st

• 3rd

• None

• *2nd* 

Q 86. Time period is reciprocal of____?

• Volum

• Velocity

• *Frequency* 

• Density

Q 87. The unit of inertia depends upon____?

• Force

• Stress

• Displacement

• *Mass* 

Q 88. The product of velocity and mass is called____?

• *Momentum* 

• Displacement

• Force l

• Torque

Q 89. Which instrument is used to measure current?

• Galvanometer

• Voltmeter

• *Ammeter* 

• Potentiometer

Q 90. The effect of magnet can be destroyed through ?

• Hamering

• Heating

• *Both a &b* 

• Touching

Q 91. The force exerted on machine is called___?

• Input/output

• Output/input

• *Input* 

• Output

Q 92. When a wire carrying current is placed in magnetic filed then it moves in____ direction?

• Newton's force

• Electrostatic force

• *Gravitational force* 

• Magnetic force

Q 93. In equation E = Mc² ,c represents____?

• *Velocity of light* 

• Velocity of air

• None

• Velocity of sound

Q 94. Velocity is____unit?

• Fundamental

• Vector

• *Derived* 

• Basic

Q 95. P type materials consists of___?

• Protons

• Electrons

• Positrons

•  *Holes* 

Q 96. The magnetic lines are greater on___side?

• None

•  *Outer* 

• Inward

• Surface

Q 97. The force exerted on a unit area is called____?

• Mass

• Pressure

• Strain

• *Stress* 

Q 98. According to which law liquid exerts equal in all sides?

• Newton's law

• Jeans law

• Oersted law

•  *Pascal's law* 

Q 99. The force of triction is directly proportional to ___?

•  *Mass* 

• Strain

• Its coefficient

• Velocity

Q 100. In forward circuit, the PN is connected___terminal?

• Series

• Positive

•  *Negative* 

• Parallel