Unit 1 Physics Quiz: 202 MCQs for OSSC, CGL, RRB & Govt Exams

1.An air bubble in water behaves as a:

2.While magnets attract many magnetic substances like iron, they can also repel:

3.Rocket works on the principle of:

4.A fuse is a:

5.Which law states that"when any gas is expanded or compressed st constant pressure, its volume is didectly propertional to its absolute temperature"?

6.Which of the following electrical device senses the temperature of a physical system and performs actions so that the system's temperature is maintained near a desires setpoint?

7.Which of the following statements as regards Gravitational Force is NOT correct?

8.Which of the following is a Scalar quantity?

9.What happens when a 100 watt bulb and a 60 watt bulb are connected in a series?

10."The phenomenon in which electrically charged particles are released from or within a meterial when it absorbs electromagnetic radiation" is known as:

11.When number of turns in a coil is tripled, without any change in the length of coil, its self inductance becomes:

12.Which of the following properties of sound is affected by change in air temperature?

13.Who was the first scientist to enunciate the Quantum theory?

14.Which electronic device stores electrical energy in an electric field?

15.The wave length of which of the following types of electromagnetic waves is the shortest?

16.Which of the following is applicable in case of the hydraulic brakes used in the automobiles?

17.Which one of the following pairs of the process of heat transfer and corresponding medium is incorrectly matched?

18.Which of the following is responsible for the formation of the phenomenon of 'Mirage'?

19.Image formed by a plane mirror is:

20.The blue colour of water in the sea is due to the :

21.Potassium graphite and Calcium graphite can be mostly used as:

22.Which among the following does provide colours to fine-cut diamond?

23.On which of the following scientific principles is an electric generator based?

24.Knot' is the unit of :

25.The work done to move a unit charge from a point to another is called:

26.Which among the following is a non-conservative force?

27.The inability of a body to change its state of rest or uniform motion by itself is known as:

28.In which of the following cases the apparent weight of a body in an elevator becomes zero?

29.When a body is immersed in a liquid the upward force experienced by it is known as:

30.Which of the following is responsible for the production of an echo?

31.The purity of Milk is measured by the instrument known as:

32.The equipment SONAR is used to determine the:

33.Who invented Dynamo?

34.Name the physicist who is credited with the discovery of the Neutron. This 1932 discovery led to his winning the Nobel Prize.

35.Which law of Physics states that "The force between the two electric charges reduces to a quarter of its former value when the distance between them is doubled"?

36.1 horsepower = approximately__________ watts.

37.________ expansion makes the Effel Tower taller during summers.

38.What is the name of the phenomena in Physics and astronomy which involves the splitting of a spectral line into two or more components of slightly different frequency when the light source is placed in a magnetic field?

39.Which of these is the energy conversion that happens in the process called photosynthesis?

40.What is the colour of the light emitted by the Sun?

41.Name the law in Physics which states that" Equal volume of all gases under the same conditions of temperature and pressure contain equal number of molecules".

42.The total number of images formed by two mirrors inclined at 120 degree to each other is___________.

43.Which of the following is used as a substitute of Mercury in thermometers?

44.Who among the following scientists invented the Cotton Gin?

45.Ozone at the higher level of the atmosphere is a product of _________ acting on oxygen molecules.

46.The power of a lens is -2.0 D. Here 'D' stands for:

47.Which among the following has its refractive index closest to that of crown glass?

48.The rating for a fuse used in a household electric circuit is provided on the basis of:

49.Why do water droplets always take a round shape when dropped onto plane surfaces?

50.The audible range of sound for human beings is from:

51.The sky appears blue due to:

52.The Tyndal Effect is due to:

53._______ is one of the most important technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.

54.The power of lens is measured in________.

55.Which of the fololowing is a Vector quantity?

56.The inertia of an object is measured by its_______.

57.Heat, in ______, is a type of energy transfer from a warmer substance to a cloder one.

58.Which of the following quantities is measured using a Torsion Balance?

59.<p>Who among the following introduced the concept of electric field for the first time?</p>

60.Archimedes : Buoyancy : : Newton : ______

61.Through which one among the following materials does sound travel slowest?

62.Optical fibres are mainly used for which of the following ?

63.Radar is used for :

64.Which of the following instruments is used to measure the depth of the oceans?

65.One Fermi is equal to:

66.Why do the rain bearing clouds have a dark colour?

67.We notice a spark while pulling out the electrical plug of an appliance. Which of the following properties of the appliance is responsible for this?

68.What is the function of heavy water in a nuclear reactor?

69.Wahich of the folowing is NOT true for the cathode rays?

70.Which of the following process is used to prepare industrial Hydrogen?

71.A passenger falls in the forward direction when a moving bus applies brakes to stop and falls backwards when it accelerates from rest. This is because of________.

72.Which one of the following has only magnitude and no direction?

73.Find the odd one out.

74.The line that joins the centre of curvature and the pole of a curved surface is called:

75.It is the product of power and time; its unit is W-s and KWH. What is it called?

76._______ is the change in velocity per unit time.

77.When the angle between the force and displacement is 90 degree, the work done is_______.

78.Which of the following examples illustrates Newtown's first law of motion?

79.746 Watts is known as:

80._______ is a quantity that does NOT describe the nature of a wave.

81.In the formula F = GMm/d2, what is G called?

82.Linear momentum is equal to :

83.Work can only be done when there is _______.

84.In longitudinal waves, the particles vibrate in a ________ direction of propagation.

85.Sound is prouced due to _______.

86._______ determines the speed of sound in a medium.

87.Work done on an object do NOT depends on:

88.Which of the following equations represents the Velocity-Time relation?

89.1 Coulomb/1s = ________

90.Which of the following forces is NOT electromagnetic in nature?

91.What is the value of the Gas Constant 'R'?

92.Which one of these is an example of conversion of electrical energy into mechanical energy?

93.Where does the centre of gravity os any freely suspended object lie?

94. Abody rolling down on a hill has:

95.______ is the rate of doing work.

96.Sound waves with frequencies below the audible range are called:

97.A ray of light passes from water to glass. It bends:

98.The point where entire weight of an object acts is known as the _______.

99.The gravitational force of attraction between a satellite and the Earth gives rise to ______.

100.______ is the commercial unit of energy.

101.Clouds looking white in colour are due to the phenomenon of ________.

102.In which of the following activities is work said to be done?

103.An object is released from a certain height above the ground. Just at the time it touches the ground, it will possesses________.

104.______ is preventing by coating the conducting wire with pvc.

105.To change a temperature from the Kelvin scale to the Celsius scale, you have to :

106.During the fall of an object, which of the following energies increases at any point in its path?

107.The kinetic energy of the particles is maximum in the case of______.

108.An object is placed in the front of a concave mirror at a point between its centre of curvature and focus. The image will be formed at:

109.A car is moving with a high speed. Which energy does it possess?

110.An object travels northwards with a constant velocity. The net force acting on the object will be _________.

111.When a ray of light travels from a denser medium to a rarer medium, the ray will:

112.The energy possessed by an object because of its position or shape is called________.

113.The mass of an object on the Earth is 60 Kg. What is its mass on the Moon?

114.When an object is _______ of a convex lens, the nature of the image is enlarged, virtual and erect.

115.The SI unit of Resistivity is :

116.The product of Mass and Acceleration is ______.

117.The product of Mass and Velocity is called _______.

118.What is the SI unit of Pressure?

119.Work has _________.

120.Which of the following is a use of ultrasonography?

121.All forces have:

122.What happens to the force between two objects if the masses of both the objects are tripled?

123.A spherical mirror, whose reflecting surface is curved outwards, is called a :

124.Which of the following statements is true for the law of conservation of energy?

125.In a _______ circuit, the electricity has only one path to flow through.

126.______ is/are radiation emitted by the Sun and responsible for the cause of cancer.

127.The centre of reflecting surface of a spherical mirror is a point called the _______

128.If a constant force applied on an object is given as the product of force and distance moved by the object in the direction of force, then it is termed as:

129.A Voltimeter is used to measure _______.

130.If the temperature increases, the speed of sound:

131.Which of the following is NOT a unit that measures temperature?

132.In which of the following is the velocity of sound is maximum at 25 degree centigrade?

133.Motion of a boy, sitting on a swing is______.

134.When a body falls freely under gravity, then the work done by the gravity is______.

135.The rate of change of work is _______.

136.Potential energy = Mass × ______ × Height.

137.________ is the smallest unit of Power.

138._______ cells converts solar energy into electrical energy.

139.One fathom = _____ .

140.Mho is the SI unit of which of the following physical quantity?

141.Pick the odd one out.

142.Which type of mirror is used by dentists to see large images of patients teeth?

143.Which colour deviates the least when light passes through the prism?

144.Which colour deviates the most when light passes through the prism?

145.Among various electrical safety devices, one based on the heating effect of electric current is called a :

146.Which waves cannot be transmitted through vacuum?

147.Which of the following is a mechanical wave?

148.A rader which detects the presence of an enemy aircraft uses:

149.The velocity of sound is maximum in :

150.To hear a clear echo, the minimum distance between the reflecting surface and the observer should be

151.Which of the folowing has the longest wavelength?

152.Which one of the following does a TV remote control unit use to operate a TV set?

153.The Doppler's effect is applicable for

154.A device which converts electrical energy into mechanical energy is:

155.Fuse is based on the principle of :

156.Which gas is filled in fluorescent tube?

157.The device used for converting AC to DC is called

158.Which among the following waves is used for communication by artificial satellites?

159.The dimension of which of the following is the same as that of Impulse?

160.The splitting of white light into different colours in a prism is called:

161.The snow on the mountains does not melt all at once when it is heated bt the Sun because:

162.An ice block with a piece of lead embedded in it floats in water. If ice melts the water level

163.Which of the following rays is used in oven?

164.Energy is continuously created in the Sun due to:

165.Which set of conditions represents the easiest way to liquify a gas?

166.While catching a ball a player pulls down his hands to lower the

167.If the length of a simple pendulum is halved then its period of oscillation is

168.The different colours of different stars are due to the variation of

169.When a bottle of scent is kept open in a comer of a room its odour is felt in all parts of the room. This is due to the phenomenon of:

170.A passenger standing In a bus is thrown outward when the bus takes a sudden turn happens due to

171.When pressure is increased the melting point of ice

172.Longitudinal waves cannot travel through

173.Dynamo is a device for converting

174.Oil rises up the wick in a lamp because

175.Lamberts law is related to

176.The mass energy relation is the outcome of

177.Danger signals are generally red as red light

178.An oil drop spreads over water because

179.When the main switch of the house is put off it disconnects the

180.Twinkling of stars is due to the phenomenon of:

181.A multimeter is used to measure

182.Which of the following is used to split white light Into different colours ?

183.Nuclear reactors used to produce electricity are based on

184.A fountain pen Works on the principle of

185.Optical Fibre work on the principle of

186.The energy stored in a watch spring is

187.The sensation of weightlessness in a spacecraft in an orbit is due to the

188.A parachute descends slowly whereas a stone dropped from the same height falls rapidly because

189.Newtons first law of motion gives the concept of

190.The reason for a swimming pool to appear less deep than the actual depth is

191.The swing of a spinning cricket ball in air can be explained on the basis of

192.Spectacles used for viewing 3D films have

193.A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls

194.Velocity of sound in air does not change with the change of

195.Ventilators are provided near the ceiling of the room because

196.The strongest force in nature is

197.A falling drop of rain water acquires the spherical shape due to

198.The weakest of all fundamental forces is

199.A mirage occurs because of

200.A soap bubble shows colours when illuminated with white light. This is due to

201.A person is hurt on kicking a stone due to

202.If a boy sitting in a train which is moving at a constant velocity throws a ball straight up into the air the ball will