71.Two teams are puling a rope with equal and opposite forces each of 5 KN in a tug of war so that a condition of equilibrium exists. What will be the tensile force in the rope ?
a. zeri
b. 2.5 KN
c. 5KN
d. 10 KN
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Answer: 5KN
72. Scalars are quantities that are described by ____
a. Magnitude
b. Direction
c. Magnitude & Direction
d. Motion
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ANSWER: a. Magnitude
73.The ionization potential of hydrogen is 13.6 eV. The energy of an electron in the second orbit is
a. 54.4 eV
b. -6.8 eV
c. -27.2 eV
d. -3.4 eV
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ANSWER : : -3.4 eV
74. Which of the following measurements is not a unit of distance?
A. Ammeter
B. Cubit
C. Parsec
D. angstrom
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Answer : A. Ammeter
75. Rate of change of momentum is called?
A. Force
B. Pressure
C. Velocity
D. Speed
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Answer. A
76. A satellite in vacuum -
1. Is kept in orbit by remote control
2. Is kept in orbit by retro-rocket
3. Derives energy from gravitational field
4. Does not require any energy for orbiting
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Ans: 4
77. Radiocarbon is produced in the atmosphere as a result of
A. collision between fast neutrons and nitrogen nuclei present in the atmosphere
B. action of ultraviolet light from the sun on atmospheric oxygen
C. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D. lightning discharge in atmosphere
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Answer: A
78. The most suitable unit for expressing nuclear radius is
A) micro
B) nanometre
C) fermi
D) angstrom
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Answer C) fermi
79. Which one of the following is used as a moderator in nuclear reactor
A. radium
B. graphite
C. thorium
D. ordinary water
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Answer B
80. On which one of the following conservation laws, does a rocket work?
A. Mass
B. Energy
C. Linear momentum
D. Angular momentum
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Answer : c. Linear momentum
81. The unit of pressure is -
A. Kg / cm2
B. Kg / cm
C. Kg / mm
D. Nm
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Answer: B. Kg / cm
82.
How much heat is required to raise the temperature of 1g of water by 1 oC.
a. 100 Joules
b. 100 Calories Wrong!
c. 1 Calorie Right!
d. 1 Joule
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Answer: c
83. One radian is defined to be the angle subtended where the arc length “S” is exactly equal to the?
a. half of radius of the circle.
b. diameter of the circle.
c. radius of the circle.
d. circumference of the circle.
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Answer: c
84. Name the device which converts electric energy into mechanical energy :
a. alternator
b. transformer
c. dynamo
d. motor
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Answer: d
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43. An equiconvex lens is prepared from a glass of refractive index 1.5. The radius of curvature of the surface is 0.5 m. The focal length of the lens is
a. 0.5 m
b. 1.0 m
c. 1.5 m
d. 2.0 m
44. Which of the following types is used by computed tomography employed for visualisation of the internal structure of human body ?
a. X-Rays
b. Sound waves
c. magnetic resonance
d. radio-isotopes
45. Atmospheric pressure is measured by
a. Tonometer
b. Pyrometer
c. Barometer
d. Thermometer
46. In the winter season if we touch two blocks one of iron and another of wood in the early morning then the block of iron appears to be more cold because:
a. the temperature of the iron block is less then that of the wooden block
b. iron is a bad conductor of heat in comparison of the wood
c. iron is a bad conductor of heat is comparison of the wood >
d. the block of iron is heavier than the wooden block
47. If a bomb dropped from an airplane explodes in mid-air _________?
a. its KE increases
b. its total energy increases
c. its total energy decreases
d. its total momentum decreases
48. In which one among the following is the speed of sound maximum?
A. Ait at 0 degree
B. Ait at 100 degree
C. Water
D. Wood
49. Which of the following is a vector quantity ?
a. Momentum
b. Pressure
c. Energy
Work
50. A car goes straight from a point A to a point B with a velocity of 40 km/h and return back with a velocity of 60 km/h. The average velocity during the whole journey is;
a. 0
b. 48 km/h
c. 50 km/h
d. none
51. A light wave travelling in a transparent homogeneous medium enters another homogeneous transparent medium of higher refractive index. The speed of light in the second medium;
a. is less than that in the first medium
b. is more than that in the first medium
c. is the same as that in the first medium
d. may be more or less than that in the first medium depending on the angle of incidence
52. When light waves pass from air to glass the variables affected are
a. wavelength frequency and velocity
b. velocity and frequency
c. wavelength and frequecy
d. wavelength and velocity
53. Which one of the following is printed on a commonly used fluorescent tube light?
A. 220 K
B. 273 K
C. 65000 K
D. 9000 K
54. The water from a hand pump is warm in winter because:
a. our body is cold in winter and water appears to be warm
b. the temperature inside the earth is higher than the atmospheric temperature
c. inside water comes out and absorbs heat from the environment
d. the pumping process causes friction which warms up the water
55. Fat can be separated from milk in a cream separator because of __________?
a. cohesive force
b. gravitational force
c. centripetal force
d. centrifugal force
56. A diode can be used for?
a. amplification
b. modulation
c. detection
d. rectification
57. A person stands at the middle point of a wooden ladder which starts slipping between vertical wall and the floor of the room, while continuing to remain in a vertical plane. The path raced by a person standing at the middle point of the slipping ladder is:
a. straight line
b. a elliptical path
c. a circular path
d. a parabolic path
58. In a healthy human eye, the focussing is done by the
a. to and fro movement of the eye lens
b. changing curvature of the retine
c. change in the convexity of the lens through ciliary muscles
d. change in the refractive index of the eye fluid
59. The velocity of sound produced by a vibrating body varies:
a. directly as the sq. root of density of the medium
b. inversely as the density of the medium
c. directly as the sq. root of frequency of the medium
d. inversely as the frequency of the medium
60. Which colour of heat radiation represents the highest temperature ?
a. blood red
b. dark chery
c. salmon
d. white
61. What is the relation between wavelength, frequency and velocity ?
a. velocity of wave = frequency * wavelength
b. velocity of wave = frequency/wavelength
c. velocity of wave = wavelength/frequency
d. None of above
62. Sound travels at the fastest speed in
A.steel
B.water
C.air
D.vacuum
63. Melting point of ice
a. increase with increase of pressure
b. decrease with increase of pressure
c. is independent of pressure
d. None of these
64. The value of which one of the following quantity remains same in all system of units ?
a. Acceleration due to gravity
b. Specific gravity
c. pressure
d. density
65. The magnifying power of a telescope can be increased by
a. reducing the focal length of the eye piece
b. increasing the diameter of the objective
c. reducing the focal length of the objective
d. increasing the diameter of the eyepiece
66. which one of the following statements is correct ? Transfer of heat energy from a heater coil to the cooking vessel takes place through the process of
a. convection only
b. conduction and convection only
c. radiation and convection only
d. convection conduction and radiation
67. A particle is executing simple harmonic motion. Its total energy is proportional to its:>
a. displacement from equilibrium position
b. frequency of oscillation
c. square of amplitude of motion
d. velocity at equilibrium position
68. Which of following in not a property of cathode ray.
a. Cathode rays are invisible and travel in a straight line.
b. These rays can ionise gases.
c. These rays can penetrate through thin metal foils.
d. These rays make materials cool on which they fall.
69. If the temperature inside a room is increased, the relative humidity will?
a. increase
b. decrease
c. remain unchanged
d. none of these
70. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
A.X-rays
B.ultraviolet light
C.visible light
D.radio waves
Answers:
43. Answer: 0.5 m
44. Answer: X-Rays
45. Answer: Option C
46. Answer: iron is a bad conductor of heat in comparison of the wood
47. Ans. A
The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
48. Answer : C. Water
49. Answer: Momentum
50. Answer: 0
51. Answer: is less than that in the first medium
52. Answer: wavelength and velocity
53. Answer : C. 65000 K
54. Answer: the temperature inside the earth is higher than the atmospheric temperature
55. Ans. D
The centrifugal separator was invented in 1897. By the turn of the century it had altered the dairy industry by making centralised dairy processing possible for the first time. It also allowed removal of cream and recovery of the skim milk in a fresh state.
56. Ans. D
Rectification
The most common function of a diode is to allow an electric current to pass in one direction (called the diode's forward direction), while blocking current in the opposite direction .Thus, the diode can be viewed as an electronic version of a check valve. This unidirectional behavior is called rectification, and is used to convert alternating current to direct current, including extraction of modulation from radio signals in radio receivers—these diodes are forms of rectifiers.
57. Answer: a circular path
58. Answer: change in the convexity of the lens through ciliary muscles
59. Answer: >inversely as the density of the medium
60. Answer: white
61. Answer: Option A
62. Answer & Explanation Answer: Option D Explanation: No answer description available for this question. Let us discuss.
63. Ans. B
The melting point of ice at 1 atmosphere of pressure is very close to 0 °C (32 °F, 273.15 K); this is also known as the ice point.
64. Answer: Specific gravity
65. Answer: reducing the focal length of the eye piece
66. Answer: radiation and convection only
67. Answer: square of amplitude of motion
68. Answer: Option D
69. Ans. B
Decrease
This is because temperatures in the home can be much different than the temperature outside. This is because of that important relationship between temperature and how much maximum moisture can be in the air.
70. Answer: visible light
29- 42 bits click here
126.Cooking taken longest time
a. the sea level
b. Simla
c. Mount Everest
d. None of these
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Ans. C
At Mount Everest
Everest is 8.848 kilometers tall, the highest elevation above sea level, the lower the air pressure.
That's because there's less air above you pushing down. When air pressure is lower, it's easier for water to boil--to change from liquid to gas. So as you go up a mountain, the temperature needed to make the water boil is lower. The other factor is that once water is boiling, it doesn't get any hotter. All the extra energy going into the boiling water is being used to change the liquid into gas.
127. What does Displacement refer to?
a. It refers to how much ground an object has covered
b. It refers to how far out of place an object is
c. It refers to how fast an object is moving
d. It refers to the rate at which an object changes its position
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ANSWER: b. It refers to how far out of place an object is
128. Name the barometer which does not contain a liquid:
a. Aneroid barometer
b. Fortin's barometer
c. Mercury barometer
d. Barostat
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ANSWER: a. Aneroid barometer
128. Speed is _____
a. Scalar quantity which does not keep track of direction
b. Scalar quantity which keeps track of direction
c. Vector quantity which does not keep track of direction
d. None of above
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ANSWER: a. Scalar quantity which does not keep track of direction
129. Which of the following is similar to the solar system
a. Rutherford atom model
b. Dalton atom model
c. Thomson atom model
d. Prout atom model
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ANSWER : : Rutherford atom model
130. Zinc Oxide is
A. Acidic
B. Basic
C. Neutral
D. Amphoteric
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Answer : D. Amphoteric
131. Rate of change of displacement is called?
A. Speed
B. Work
C. Force
D. Velocity
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Answer. D
132. To correct his/her vision, a person suffering from short-sightedness will have to use -
1. Convex lens
2. Concave lens
3. Convex mirror
4. Bifocal Lens
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Ans: 2
133. Which instrument is used to measure depth of ocean ?
Galvanometer
Fluxmeter
Endoscope
Fathometer
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Answer: Option D
134. What is the heaviest of the naturally occuring Noble gases?
A. Radon
B. Xenon
C. Helium
D. Argon
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Answer : A. Radon
135. Siphon will fail to work if
A. the densities of the liquid in the two vessels are equal
B. the level of the liquid in the two vessels are at the same height
C. both its limbs are of unequal length
D. the temperature of the liquids in the two vessels are the same
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Answer: B
136. Which one of the following remains constant while throwing a ball upward?
A. Displacement
B. Kinectic energy
C. Acceleration
D. Velocity
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Answer : C. Acceleration
137. In a freezer ice cubes will be formed more quickly in trays made of
A. rubber
B. plastic
C. aluminium
D. wood
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Answer: C) aluminium
Explanation:
Aluminium being a good conductor of heat conducts away the heat from the substance quite easily and causes quick freezing.
138. Which one of the following remains constant while throwing a ball upward?
A. velocity
B. displacement
C. acceleration
D. kinectic energy
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Answer: C. acceleration
139. A freely suspended magnet always aligns itself along the Add Question to Review List
a. West South Axis
b. East West Axis
c. North South Axis
d.East South Axis
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Answer: c. North South Axis
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29. What element’s three isotopes have different names?
A. Helium
B. Oxygen
C. Carbon
D. Hydrogen
30. The noise level of 100 decibel would correspond to :
a. Just audible sound
b. ordinary conversation
c. sound from a noisy street
d. noise from a machine shop
31. newton is used to measure
a. Speed
b. Volume
c. Force
d. Area
32. A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is____?
a. accelerated
b. uniform
c. retarded
d. along the circular tracks
33. What is the principle by which a cooling system (Radiator) in a motor car works ?
a. Conduction only
b. convection
c. radiation only
d. both conduction and radiation
34. The wavelength of X-rays is of the order of
A. 1 cm
B. 1 m
C. 10 micron
D. 1 Angstrom
35. Decibel is the unit of:
a. Speed of light >
b. intensity of sound
c. intensity of heat
d. none of these
36. A lens, immersed in a liquid becomes in visible when
a. the focal length of the lens is zero
b. the focal length of the lens is infinite
c. the refractive index of the lens is less than the refractive index of the liquid
d. the refractive index of the lens is equal to the refractive index of the liquid
37. Which one of the following does TV remote control unit use to operate a TV set ?
a. light waves
b. sound waves
c. micro waves
d. radio waves
38. What is newton third law of motion ?
a. Every body maintains its initial state rest or motion unless no external force is applied.
b. The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force.
c. To every action there is equal and opposite reaction.
d. None of above.
39.Which of the following is the best conductor of the heat:
a. mercurty
b. silver
c. leather
d.benzene
40. Definition of force comes from Newton’s ____________?
a. first law of motion
b. second law of motion
c. third law of motion
d. law of gravitation
41. Which one of the following is a good conductor of electricity?
A. Shellac
B. Ebonite
C. Glass
D. Human body
42. One astronomical unit is the average distance between
a. Earth and the Sun
b. Earth and the moon
c. Jupiter and the Sun
d. Pluto and the Sun
Answers
29. Answer : D. Hydrogen
30. Answer:
noise from a machine shop
31. Answer: Option C
32. Ans. A
Accelerated
Acceleration is the rate of change of velocity of an object. An object's acceleration is the net result of any and all forces acting on the object.
33. Answer: convection
34. Answer : D. 1 Angstrom
35. Answer: intensity of sound
36. Answer: the refractive index of the lens is equal to the refractive index of the liquid
37. Answer: >radio waves
38. Answer: Option C
Explanation:
Newton First Law of Motion : Every body maintains its initial state rest or motion unless no external force is applied.
Newton Second Law of Motion : The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force.
View Answer
39. Answer: >silver
40. Ans. B
Second law of motion
Newton’s Second law: The vector sum of the external forces F on an object is equal to the mass m of that object multiplied by the acceleration vector a of the object: F = ma.
41. Answer : D. Human body
42. Answer: Earth and the Sun
15. Which vitamin is abundant in citrus fruits?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
16. Which of the following physical quantities have the same dimensions?
a. Angular momentum and work
b. Work and Torque
c. Potential energy, linear momentum
d. Kinetic energy, velocity
17. The change of a solid into vapour directly is called:
a. vaporization
b. freezing
c. melting
d. sublimation
18.Which of the following measurements is not a unit of distance?
A. Ammeter
B. Cubit
C. Parsec
D. angstrom
19. Ampere is the Unit of :
a. Current electricity
b. magnetic field
c. electric charge
d. resistance
20. The focal length of the lens in a photographic camera is 5 cm. What is the power of the lens ?
a. +5 D
b.+10 D
c.+ 15 D
d.+ 20 D
21. When the frequency distribution is normal:
a. median mode and onean are all different from one another
b. mean mode and median are identical
c. mean is greater than mode
d.mean is greater than median
22. Water is a _____________ Conductor of electricity.
A. super conductor
B. bad conductor
C. speed conductor
D. None of these
23. Alexander Graham Bell invented
a. Telephone
b. Telescope
T. elevision
d. Tank
24. Which of the following is not a vector quantity?
a. Speed
b. Velocity
c. torque
d. displacement
25. A hollow sphere of radius R, a hollow cube of side R and thin circular plate of radius R made up of the some material are all heated to 20 degree C above room temperature. When left to cool in the room, which of them will reach the room temperature first ?
a. Circular plate
b. cube
c. sphere
d. all of them will reach the room temperature at the same time
26. The Central Arid Zone Research Institute (CAZRI) is located at
A. Jaipur
B. Jodhpur
C. Jaisalmer
D. Jallandhar
27. What is the SI unit of pressure:
a.Pascal
b.Dyne
c.Newton
d.Jule
28.The image formed on the retina of a human eye is
a. virtual and inverted
b. virtual and erect
c. real and erect
d. real ad inverted
Answers:
15. Answer : C. Vitamin C
16. Ans. B
17. Work and Torque
Work is the measure of a quantity that is capable of accomplishing Macroscopic Motion of a System due to the action of a Force over a Distance. Torque is the tendency of a force to rotate an object about an axis, fulcrum, or pivot.
18. Answer: >sublimation
19. Answer : A. Ammeter
20. Answer: >Current electricity
21. Answer: + 20 D
22. Answer: >mean mode and median are identical
23. Answer : B. bad conductor
24. Answer: Option A
Explanation:
Alexander Graham Bell of USA invented Telephone in 1876,
Telescope was invented by Hans Lippershey of Netherlands in 1608,
Television was invented by John Logie Bared of Scotland in 1926,
Tank was invented by Sir Ernest Swington of England in 1914.
24. Ans. A
Speed: The speed of an object is the magnitude of its velocity (the rate of change of its position).
25. Answer: sphere
26. Answer : B. Jodhpur
27. Answer: Pascal
28. Answer: real ad inverted
