9

Class 10 Physics
Past Papers MCQs
Grand Practice Test

1 / 135

The unit of e.m.f in SI system is volt, which is equal to:

2 / 135

One of the isotopes of Uranium is ^{ 236 }{ U }_{ 92 } . The number of neutrons in this isotope is:

3 / 135

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. The focal length of the mirror is:

4 / 135

For finding a virtual and erect image by a converging lens, object should be placed:

5 / 135

The magnifying power of a simple microscope is given as:

6 / 135

The process by which electrons are emitted by a hot metal surface is known as:

7 / 135

How many times speed of sound is greater in water than air?

8 / 135

Capacitance is defined as:

9 / 135

During fission of 1 kg of uranium-235 _______ energy is released.

10 / 135

The unit of electric potential is:

11 / 135

The intensity level of mosquito buzzing is:

12 / 135

The Audible Frequency Range for human beings is from 20 Hz to:

13 / 135

Two resistors of 20\Omega each are connected in parallel with a battery of 10V, the total current passing through the circuit is:

14 / 135

The sound energy passing per unit area per second is called:

15 / 135

What is the length of second’s pendulum?

16 / 135

If speed of sound is 340 ms^{-1} at normal temperature in air we can hear the echo after:

17 / 135

The human ear can respond to the intensities ranging from:

18 / 135

Approximate speed of sound in distilled water at 25 °C is:

19 / 135

What happens to the atomic number of an element which emits one alpha particle and a beta particle?

20 / 135

The loudness of a sound is most closely related to:

21 / 135

S.I unit of spring constant “K” is:

22 / 135

A ray of light in glass is incident on an air surface at an angle greater than the critical angle, the ray will:

23 / 135

If the mass of bob of a pendulum is increased by a factor of ‘2’ then the period of pendulum motion will:

24 / 135

Capacitance is defined as:

25 / 135

The SI unit of electric potential difference is:

26 / 135

What is the power of a lamp connected to a 12V source when it carries 2.5 A current?

27 / 135

The half life of a certain isotope is 1 day. What is the quantity of isotope after 2 days?

28 / 135

In Vacuum, all electromagnetic waves have the same:

29 / 135

Waves transfer:

30 / 135

The pendulum clock was invented by:

31 / 135

Which of the following is NOT processing?

32 / 135

Which one is incorrect when three capacitors are connected in parallel?

33 / 135

Which of the following equations is correct for magnification?

34 / 135

The focal length of a convex lens of power
5 D is ______ cm.

35 / 135

If the length of the simple pendulum is halved its new time period ‘T’ will become:

36 / 135

Which one is OHMIC in nature?

37 / 135

Endoscope which is used to diagnose bladder is called:

38 / 135

If the time period of simple pendulum is one second, then its length on earth will be:

39 / 135

Kilowatt-hour is a large unit to measure:

40 / 135

Five joules of work is needed to shift 10C charge from one place to another. The potential difference between the places is:

41 / 135

House Safety Wiring is connected in:

42 / 135

The isotope ^{ 1 }{ U }_{ 1 } contains:

43 / 135

What is the frequency of second pendulum?

44 / 135

How is energy from the sun released?

45 / 135

One bel is equal to:

46 / 135

For the diagnosis of brain tumor _______ is used.

47 / 135

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

48 / 135

Five joules of work is needed to shift 5C of charge from one place to another. The potential difference between the places is:

49 / 135

The output of a NAND gate is zero when:

50 / 135

In case of vibratory motion, time period is reciprocal of the:

51 / 135

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

52 / 135

In vacuum, all electromagnetic waves have the same:

53 / 135

Focal Length of Spherical Mirror is related to the Radius of Curvature by:

54 / 135

Loudness of sound depends upon:

55 / 135

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

56 / 135

NOT Gate is also called:

57 / 135

What is the size of Nucleus?

58 / 135

The turn ratio of a transformer is 10. It means:

59 / 135

Kilowatt hour is a unit of:

60 / 135

Capacitance is defined as:

61 / 135

Three resistors of 2Ω each, connected in parallel are equivalent to a resistance of:

62 / 135

Two small charged spheres are separated by 2 mm. Which of the following would produce the greatest attractive force?

63 / 135

If 5 joule of work is needed to shift the 10 coulomb charge from one place to another place then the potential between the plates will be:

64 / 135

S.I unit of charge is:

65 / 135

The half-life of Krypton is 3 minutes. Out of 100g of Krypton, how much will be after 9 minutes?

66 / 135

When uranium (92 protons) ejects a beta particle, how many protons will be in the remaining nucleus?

67 / 135

AND gate can be formed by using two:

68 / 135

The direction of induced e.m.f in a circuit is in accordance with conservation of:

69 / 135

If X=A.B, then X=1, when:

70 / 135

The turn ratio of a transformer is 10. It means:

71 / 135

The SI unit of electromotive force is:

72 / 135

1 pF = ?

73 / 135

What is the refractive index of Ice?

74 / 135

An object is 14 cm in front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

75 / 135

A totally reflecting prism has one of its angle equal to 90° and the remaining two angles are equal to:

76 / 135

Speed of light in water is approximately:

77 / 135

The electrical power is given by:

78 / 135

According to Right Hand Rule for a current carrying conductor, current will be in the direction of:

79 / 135

Two charged spheres are separated by 2 mm. Which of the following pairs would have the highest attractive force?

80 / 135

The half life of a certain isotope is 1 day. What is quantity of the isotope after 2 days?

81 / 135

Release of energy by the Sun is due to:

82 / 135

1 eV is equal to:

83 / 135

In Vacuum, all Electro Magnetic Waves have the same:

84 / 135

Which is the correct order of radiations for penetrating ability?

85 / 135

The direction of induced e.m.f in a circuit is determined in accordance with law of conservation of:

86 / 135

The SI unit of intensity of sound is:

87 / 135

When a ball is gently displaced from the centre of a bowl, it starts oscillating about the centre due to:

88 / 135

The presence of magnetic field can be detected by a:

89 / 135

Which of the following characteristics of waves is independent of others?

90 / 135

If we double the distance between two point charges then coulomb’s force will:

91 / 135

If the length of a simple pendulum is doubled, then its new frequency f' becomes:

92 / 135

In case of OR and AND operation, if switches S1 and S2 both are open then the lamp is:

93 / 135

The equivalent capacitance of series capacitors is ________ the capacitance of any individual capacitor in the combination.

94 / 135

A ray of light passing through air with speed 3\times { 10 }^{ 8 }\quad { ms }^{ -1 } enters into glass of refractive index 1.52, the speed in glass will be:

95 / 135

In concave mirror, which surface is reflecting?

96 / 135

The half life of a certain isotope is 1 day. What is quantity of the isotope after 2 days?

97 / 135

The particles emitted from a hot cathode surface are called:

98 / 135

What is the relationship between resistance and length of a conductor?

99 / 135

One pico farad (PF) is equal to:

100 / 135

The index of refraction depends on:

101 / 135

Two capacitors of 20\muF each are connected in series with a battery of 10V. The total charge passing through the circuit is:

102 / 135

The direction of induced e.m.f in a circuit is in accordance with conservation of:

103 / 135

The loudness of a sound is most closely related to:

104 / 135

How long does it take a current of 10 mA to deliver 30 C of charge?

105 / 135

If radius of curvature is 10 cm then focal length of convex lens is:

106 / 135

Capacitance is defined as:

107 / 135

AND gate can be formed using two:

108 / 135

Which radio isotope is used for cancerous tumour?

109 / 135

Speed of sound in vacuum is:

110 / 135

The output of a NAND gate is 0 when:

111 / 135

What is the power rating of a lamp connected to a 12 V source when it carries 2.5 A?

112 / 135

Image formed by a camera is:

113 / 135

If turn ratio of a transformer is 100 then:

114 / 135

The direction of induced e.m.f in a circuit is in accordance with conservation of:

115 / 135

The property of sound wave that distinguishes between shrill and grave sound is:

116 / 135

The instrument used to see the distant objects is called:

117 / 135

The inner part of fiber optics is called:

118 / 135

If F=0.08N and X=4cm then value of “K” is:

119 / 135

Two small charged spheres are separated by 2 mm. Which of the following would produce the greatest attractive force?

120 / 135

A step-up transformer:

121 / 135

The intensity level of faintest audible sound in decibel is:

122 / 135

A converging mirror with a radius of 20cm creates a real image 30cm from the mirror. What is the object distance?

123 / 135

Waves transfer:

124 / 135

The characteristics of sound by which a loud and a faint sound can be distinguished is:

125 / 135

The unit of power of lens is:

126 / 135

The index of refraction depends upon:

127 / 135

The SI unit of intensity of sound is:

128 / 135

Rainbow is formed due to:

129 / 135

When we double the voltage in a simple circuit, we double the:

130 / 135

The critical angle of water will be:

131 / 135

Which one is not true for electric power?

132 / 135

What is the displacement of an object in simple harmonic motion when K.E=P.E?

133 / 135

If X=A.B, then ‘X’ is ‘1’, when:

134 / 135

What is the power rating of a lamp connected to a 12 V source when it carries 2.5 A current?

135 / 135

The magnitude of the sensation produced on the ear by a sound is called its:

error: Content is protected !!