#### IMPORTANT 1 MARK Physics QUESTIONS

10th Standard

Reg.No. :
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Science

Time : 01:30:00 Hrs
Total Marks : 130

Part : A

130 x 1 = 130
1. Screw Gauge is an instrument used to measure the dimensions of very small objects upto ____________.

(a)

0.1 cm

(b)

0.01 cm

(c)

0.1 mm

(d)

0.01 mm

2. In a Screw Gauge, if the zero of the head scale lies below the pitch scale axis, the zero error is_____________.

(a)

Positive

(b)

Negative

(c)

Nil

3. The Screw Gauge is used to measure the diameter of a ________ .

(a)

crowbar

(b)

thin wire

(c)

cricket ball

4. One light year is equal to _________ .

(a)

${ 365.25\times 24\times 60\times 60\times 3\times 10 }^{ 8 }m$

(b)

${ 1\times 24\times 60\times 60\times 3\times 10 }^{ 8 }m$

(c)

${ 360\times 24\times 60\times 60\times 3\times 10 }^{ 8 }m$

5. One astronomical unit is the mean distance between the centre of the Earth and centre of the ___________ .

(a)

Moon

(b)

Sun

(c)

Mars

6. _____ arrangement to prevent the user from exerting.

(a)

Sleeve

(b)

Ratchat

(c)

Pitch scale

7. The head of the sleeve is divided into_______divisions.

(a)

10

(b)

100

(c)

150

(d)

200

8. The least count of an ordinary scale is ________

(a)

1mm.

(b)

1cm

(c)

0.1mm

(d)

0.01mm

9. A screw gauge works on the principle of _____

(a)

pulley

(b)

screw

(c)

inclined plane

(d)

lever

10. The smallest length that can be measured accurately using an instrument is called _______

(a)

pitch of the screw

(b)

least count

(c)

millirnetre

(d)

centimetre

11. Which one is used for measuring the thickness of a glass plate?

(a)

Vernier callipers

(b)

Screw gauge

(c)

Scale

(d)

Vernier scale

12. The error that creeps into the measurement by not keeping the eye vertically above the division is ____

(a)

positive error

(b)

negative error

(c)

absolute error

(d)

parallax error

13. If the zero mark of the head scale does not coincide with pitch scale axis, then the screw gauge has

(a)

no zero error

(b)

zero error

(c)

absolute error

(d)

parallax error

14. If 'x' is the distance travelled by the tip of the screw through a nut when 'n' complete revolutions of the head are made, then pitch of the screw P = _____

(a)

nx

(b)

x/n

(c)

n/x

(d)

x+n

15. If P is the pitch of the screw and Nis the number of head scale divisions, then the least count (L.C) =

(a)

PN

(b)

P+N

(c)

P/N

(d)

N/P

16. Small lengths including the diameter of the wire can be measured upto _____

(a)

fraction of metre

(b)

fractions of millimetre

(c)

fractions of a centimetre

(d)

fractions of decimetre

17. The physical quantity which is equal to the rate of change of momentum is

(a)

displacement

(b)

acceleration

(c)

force

(d)

impulse

18. The momentum of a massive object at rest is _______.

(a)

very large

(b)

very small

(c)

zero

(d)

infinity

19. The mass of a person is 50 kg. The weight of that person on the surface of the earth will be ________.

(a)

50N

(b)

35N

(c)

380N

(d)

490N

20. The freezing of biotechnology products like vaccines require ________ freezing system.

(a)

Helium

(b)

Nitrogen

(c)

Ammonia

(d)

Chlorine

21. The mass of a person is 50 kg. The weight of that person on the surface of the earth will be ____________ .

(a)

50 N

(b)

35 N

(c)

380 N

(d)

490 N

22. The unit of force is

(a)

kg

(b)

g

(c)

Newton

(d)

ms-1

23. Chandrayan operated for_______days in space.

(a)

213

(b)

321

(c)

312

(d)

321

24. Cryogenics uses the______scale of temperature.

(a)

K

(b)

0C

(c)

0F

25. Newton's first law of motion is also known as law of_____

(a)

motion

(b)

momentum

(c)

inertia

26. Which is acquired images of peaks and craters of the moon?

(a)

(b)

The Terrain Mapping Camera

(c)

Moon mineralogy mapper

27. The unit of weight is_______

(a)

Newton

(b)

Kilogram

(c)

Newton Metre

28. The SI  unit of momentum is

(a)

kg ms-1

(b)

Nm

(c)

Nm2 Kg-2

29. Which of the following is the monolithic space station?

(a)

Salyut

(b)

Salyut -6

(c)

Salyut -7

30. Ope which changes or tends to change the state of rest or of uniform motion of a body is known as______

(a)

momentum

(b)

moment of force

(c)

force

31. The value of g at sea-level and at a latitude of_____ is taken as the standard free fall acceleration.

(a)

90o

(b)

120o

(c)

45o

32. Chandrayaan-l was launched by the_________in October 2008 from Srihari Kota in Andrapradesh.

(a)

ISRO

(b)

NASA

(c)

ESA

33. Chandrayaarr I is a_______traveller.

(a)

mars

(b)

moon

(c)

jupiter

34. The mass of an object is 5kg. What is its weight on the earth? (g= 9.8 ms-2)

(a)

50N

(b)

49N

(c)

35N

(d)

490N

35. At a given place, the value of g is the same for all bodies irrespective of their_____

(a)

altitude

(b)

depth

(c)

mass

36. _________ came to the conclusion that in the absence of air,all bodies will fall at the same rate.

(a)

(b)

Newton

(c)

Galileo

37. The inertia of an object is measured by its _________

(a)

weight

(b)

momentum

(c)

mass

38. Forces acting on an object which do not change the state of rest or of uniform motion of it are called __________

(a)

balanced forces

(b)

unbalanced forces

(c)

gravitational force

(d)

electrostatic force

39. The value of g at sea-level and at a latitude of 45o is ________

(a)

6.673$\times$10-11 Nm-2kg-2

40. ________ is also commonly used and allows for the lowest attainable temperature to be reached.

(a)

Liquid helium

(b)

Hydrogen

(c)

Nitrogen

41. The resultant of two opposite forces acts on an object and brings it to motion.These opposite forces are called?

(a)

balanced forces

(b)

unbalanced forces

(c)

gravitational force

42. ________ is defined as the product of its mass and velocity of an object.

(a)

Inertia

(b)

Momentum

(c)

Weight

43. The moment of force = force x __________

(a)

perpendicular distance

(b)

anticlockwise moment

(c)

clockwise moment

44. ______ is used as rocket fuel.

(a)

Liquid hydrogen

(b)

Liquid nitrogen

(c)

Liquid helium

45. Mass of Earth is_____

(a)

$F=\frac { GMm }{ { R }^{ 2 } }$

(b)

$M=\frac { m(v-u) }{ t }$

(c)

$M=\frac { g{ R }^{ 2 } }{ G }$

46. The second law of motion is______

(a)

F = ma

(b)

$F=\frac { GMm }{ { R }^{ 2 } }$

(c)

$F=\frac { m(v-u) }{ t }$

47. The Indian space research organization is known as

(a)

ISRO

(b)

NASA

(c)

ISS

48. In physics, cryogenics is the study of the production of very -low temperature of below_______

(a)

213 K

(b)

100 K

(c)

123 K

49. A body is said to be under balanced forces when the resultant force acting on the body is ____

(a)

unity

(b)

zero

(c)

infinite

(d)

none of these

50. External forces ____

(a)

are always balanced

(b)

never balanced

(c)

mayor may not be balanced,

(d)

none of these

51. Internal forces _______

(a)

are always balanced

(b)

are never balanced

(c)

mayor may not be balanced

(d)

none of these

52. The law which defines force is ________

(a)

Newton's law of gravitation

(b)

Newton's First law of motion

(c)

Newton's Second law of motion,

(d)

Newton's Third law of motion

53. First law of motion defines _______

(a)

inertia,

(b)

force

(c)

momentum

(d)

speed

54. When an unbalanced force acts on a body, the body ____

(a)

will remain at rest

(b)

will be accelerated

(c)

will move with uniform velocity

(d)

none of the above

55. An object cannot change the state of rest or motion till any force is pot applied due to __

(a)

its mass

(b)

its weight

(c)

its inertia

(d)

its acceleration

56. Inertia depends upon _____

(a)

velocity of the body

(b)

acceleration of the body

(c)

shape of the body

(d)

mass of the bod

57. The combined effect of mass and velocity is taken into account by a physical quantity called

(a)

torque

(b)

moment of foree

(c)

momentum

(d)

moment of momentum

58. Momentum is a measure of _______

(a)

weight

(b)

mass

(c)

velocity

(d)

quantity of motion

59. The law which gives a quantitative measurement of force is _______

(a)

Newton's Third law

(b)

Newton's First law of motion

(c)

Newton's Second law

(d)

Newton's law of gravitation

60. When a constant force is applied on a body, it moves with uniform _____

(a)

speed

(b)

velocity

(c)

momentum,

(d)

acceleration

61. Measurement of force is done on the basis of __

(a)

Newton's First law

(b)

Newton's Second law

(c)

Newton's 'Third law,

(d)

None of the above

62. Galileo's law of inertia is another name for Newton's ________ law of motion

(a)

first

(b)

second

(c)

third

(d)

none of the above

63. When a net force acts on an object, the object will be accelerated in the direction of the __ force with ail acceleration proportional to the

(a)

force on the object

(b)

velocity of the object

(c)

mass of the object

(d)

inertia of the object

64. When a force acts on the body_______

(a)

velocity always increases

(b)

it always, falls towards the earth

(c)

it undergoes acceleration,

(d)

only direction changes

65. Newton's II law of motion enables us to determine the object's _______

(a)

weight

(b)

speed

(c)

acceleration

(d)

position

66. The rate of change of momentum of a body is a measure of _____

(a)

pressure

(b)

force

(c)

mass

(d)

inertia

67. A force applied on an object is equal to _____

(a)

product of mass of object and velocity

(b)

sum of mass and velocity of an object

(c)

of mass and acceleration of an object

(d)

sum of mass and acceleration

68. Kilowatt-hour is the unit of __________.

(a)

potential difference

(b)

electric power

(c)

electric energy

(d)

charge

69. The atomic number of natural radioactive element is _________.

(a)

greater than 82

(b)

less than 82

(c)

not defined

(d)

atleast 92

70. Which one of the following statements does not represents Ohm’s law?

(a)

current / potential difference = constant

(b)

potential difference / current = constant

(c)

current = resistance x potential difference

71. The symbol of ammeter is_______

(a)

V

(b)

A

(c)

G

(d)

I

72. The main source of bio-mass energy is_________

(a)

coal

(b)

heat energy

(c)

thermal energy

(d)

cow-dung

73. The unit of electric current is

(a)

amphere

(b)

volt

(c)

watt

(d)

kilo-watt

74. The energy produced when 1 kg of a substance is fully converted into energy is

(a)

$9\times { 10 }^{ 16 }J$

(b)

$9\times { 10 }^{ 8 }J$

(c)

$18\times { 10 }^{ 8 }J$

(d)

$18\times { 10 }^{ 16 }J$

75. The electric potential is measured by an instrument ____________.

(a)

ammeter

(b)

ohmmeter

(c)

multimeter

(d)

voltmeter

76. How many electrons constitute one coulomb of charge?

(a)

6x1018

(b)

1.6x1018

(c)

1.6x10-19

(d)

6.25x1018C

77. The symbol of' Ammeter_______

(a)

V

(b)

A

(c)

G

(d)

I

78. The unit of electric current is _______

(a)

Ampere

(b)

Volt

(c)

Watt

(d)

Kilo-watt

79. The energy produced when 1 kg. of a: substance is fully converted into energy is

(a)

9$\times$1016J

(b)

18$\times$1016J

(c)

27$\times$1016J

(d)

36$\times$1016J

80. The symbol of voltmeter is_________

(a)

(b)

(c)

(d)

81. One kilo Watt hour is________Joule.

(a)

3.6$\times$10-6

(b)

3.6$\times$106

(c)

6.3$\times$106

(d)

6.3$\times$10-6

82. The electro motive force (emf) of lechlanche cell is______

(a)

1.5 V

(b)

1.08 V

(c)

2.2 V

(d)

2.5 V

83. The atomic number of natural radioactive element is_______

(a)

greater than 82

(b)

less than 82

(c)

Not defined

(d)

at least 82

84. 1 kilowatt =____watt.

(a)

2000

(b)

1000

(c)

3.6$\times$106

85. The potential difference between live wire and neutral wire is________

(a)

220 V

(b)

1.5 V

(c)

1.08 V

86. An example for Primary cell is________

(a)

Volatic cell

(b)

leclanche cell

(c)

87. _________ is an important component of all domestic circuits.

(a)

electric power

(b)

electro chemical cell

(c)

electric fuse

88. Fossil Fuel : Coal Biomass:_________

(a)

Cowdung

(b)

Petroleum

(c)

Uranium

89. The positive electrode of voltaic cell is_______

(a)

copper

(b)

zinc

(c)

dilute sulphuric acid

90. The electrolyte in voltaic cell is ______

(a)

ammonium chloride

(b)

nitric acid

(c)

dilute sulphuric acid

91. Which energy is an environment friendly?

(a)

Hydro power

(b)

Solar energy

(c)

Wind energy

92. The potential difference between two points is

(a)

W/Q

(b)

WQ

(c)

VWQ

(d)

Q/I

93. The cells from which the electric energy is derived by irreversible chemical reaction are called________

(a)

volta cells

(b)

primary cells

(c)

secondary cells

94. When 2kg of substance is converted into energy then the energy produced is

(a)

9$\times$1016J

(b)

18$\times$1016J

(c)

27$\times$1016J

(d)

36$\times$1016J

95. The zinc rod of the voltaic cell is act as__________electrode.

(a)

negative

(b)

positive

(c)

neutral

96. The wires in the supply usually with red insulation is called________

(a)

earth wire

(b)

live wire

(c)

neutral wire

97. The difference of potential between the two electrodes of voltaic cell is________

(a)

1.08V

(b)

1.5V

(c)

15A

(d)

5A

98. In domestic electric circuit the wire in green insulation is called as_____

(a)

live wire

(b)

neutral wire

(c)

earth wire

99. A common application of Joule's heating is the______used in electric circuits.

(a)

heater

(b)

positive electric wire

(c)

negative electric wire

(d)

fuse

100. _______energy is converted into electrical energy in voltaic cell

(a)

Light

(b)

Chemical

(c)

Sound

(d)

Mechanical

101. One coulomb is equal to the charge contained in _______electrons.

(a)

6.25$\times$1018

(b)

6.10$\times$1018

(c)

5.25$\times$1018

(d)

6.15$\times$1012

102. The magnification produced by a mirror is +1/3 . Then the mirror is a _______

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

103. An electric current through a metallic conductor produces _________ around it.

(a)

magnetic field

(b)

mechanical force

(c)

induced current

104. An object is placed 25 cm from a convex lens whose focal length is 10 cm. The image distance is ________ .

(a)

50cm

(b)

16.66cm

(c)

6.66cm

(d)

10cm

105. _________ discovered electromagnetic induction.

(a)

Oersted

(b)

(c)

Edison

(d)

Newton

106. A device which converts electrical energy into mechanical energy is _________

(a)

Generator

(b)

Motor

(c)

Transformer

(d)

Power supply

107. The defect hypermetropia can be corrected by using a _________

(a)

convex lens

(b)

concave lens

(c)

concave mirror

(d)

convex mirror

108. The defect myopia can be corrected by using a_______

(a)

convex lens

(b)

concave lens

(c)

concave mirror

(d)

convex mirror

109. The Hubble space telescope designed with the________is known for good imaging performance over a wide field of view.

(a)

Convex mirror

(b)

Concave mirror

(c)

Hyperbolic mirror

(d)

Plane mirror

110. Twinkling of star is due to

(a)

Reflection

(b)

Atmospheric refraction

(c)

Dispersion

(d)

Scattering

111. The ratio of the height of the image to the height of the object is called as_____

(a)

angle of prism

(b)

principal axis

(c)

focal length

(d)

magnification

112. __________ is also known as near sightedness.

(a)

hypermetropia

(b)

presbyopia

(c)

myopia

113. The eyeball has become too small due to the defect of _________

(a)

myobia

(b)

hypermetropia

(c)

presbyobia

114. The SI unit of power of a lens is __________

(a)

dioptre

(b)

metre

(c)

kilometer

(d)

ampere

115. The direction of induced current can be found using ____

(a)

Fleming's left hand rule

(b)

(c)

Fleming's right hand rule

116. _________ suggested that the magnet must also exert an equal and opposite force on the current - carrying conductor.

(a)

Ampere

(b)

(c)

Fleming

117. In Fleming's left hand rule, the middle finger points in the direction of_____

(a)

motion of the conductor

(b)

magnetic field

(c)

direction of current

118. __________ mirrors are used to focus sun light to produce heat in solar furnaces.

(a)

Large concave

(b)

Convex

(c)

Spherical

(d)

All the three

119. A device that reverses the direction of flow of current through a circuit is called a_______

(a)

electric motor

(b)

commutator

120. Which of the following is match to the fleming's left hand rule?

(a)

(b)

(c)

121. ___________ convert the mechanical energy into electrical enerqy

(a)

Electric motor

(b)

Electric generator

122. We can study formation of image by speherical mirrors by drawing________

(a)

diagrams

(b)

ray diagrams

123. _______ is called diverging lense.

(a)

Convex lens

(b)

Concave lens

124. _________ made an important breakthrough by discovering how a magnet can be used to generate electric currents.

(a)

(b)

Oersted

(c)

Ampere

125. The central point of a lens is called its _________

(a)

concave lens

(b)

convex lens

(c)

refraction of light

(d)

optical centre

126. The splitting of light into its component colours is called ________

(a)

dispersion

(b)

magnification

(c)

refraction

127. _____ arises due to the gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens

(a)

Hypermetropia

(b)

Myopia

(c)

Presbyopia

128. Myopia defect arises due to________

(a)

eyeball has become too small

(b)

elongation of the eyeball

(c)

diminishing flexibility of the eye lens

129. Hypermetropia defect arises due to ______

(a)

eyeball has become too small

(b)

elongation of the eyeball

(c)

diminishing flexibility of the eye lens

130. Presbyopia defect arises due to_______

(a)

eyeball has become too small

(b)

elongation of the eyeball

(c)

diminishing flexibility of the eye lens