Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Physics MCQ (Multiple Choice Questions)

 Que- Super cooling stands for cooling of a liquid : 

a. At freezing point 

b. Below freezing point 

c. At melting point 

d. Above melting point 

Answer- Below freezing point

Que- The spring constant of a spring depends on its 

a. Length only 

b. Material only 

c. Length and its diameter 

d. Thickness, its diameter and its material 

Answer- Thickness, its diameter and its material

Que- The average kinetic energy of the molecules of an ideal gas is directly proportional to 

a. Velocity of Molecules 

b. Mass of Molecules 

c. Absolute temperature of the gas 

d. Temperature of environment 

Answer- Absolute temperature of the gas

Que- Steel is more elastic than rubber because it : 

a. Requires larger deforming force 

b. Is never deformed 

c. Is deformed very easily 

d. Is harder than rubber 

Answer- Is deformed very easily

Que- Water will not be vapourised if 

a. The temperature is 0°C 

b. The humidity is 0% 

c. The humidity is 100% 

d. The temperature is 100°C 

Answer- The humidity is 100%

Que- Relative humidity is expressed as 

a. Grams 

b. Kilograms 

c. Percentage 

d. Ratio 

Answer- Percentage

Que- According to special theory of relativity the mass of a particle 

a. Increases with increase in velocity with respect to an observer. 

b. Decreases with increase in velocity. 

c. Decreases with decrease in velocity. 

d. Is independent of its velocity. 

Answer- Increases with increase in velocity with respect to an observer.

Que- Bolometer is used to measure 

a. Frequency 

b. Temperature 

c. Velocity 

d. Wavelength 

Answer- Temperature

Que- Boyle's law relates to 

a. Kinetic Theory of Gases  

b. Viscosity of Liquids  

c. Elasticity of Solids  

d. Plasticity of Solids  

Answer- Kinetic Theory of Gases 

Que- Absolute Zero is defined as 

a. The temperature at which all molecular motion ceases 

b. At which water boils at 298K 

c. At which liquid Helium boils 

d. At which the volume becomes zero 

Answer- The temperature at which all molecular motion ceases

Que- At what temperature (in degree Celsius), the numerical values on Celsius and Fahrenheit scales become equal? 

a. –40 

b. 40 

c. 273 

d. –273 

Answer- –40

Que- At what temperature (in Fahrenheit) pure water freezes? 

a. 32 

b. 0 

c. 48 

d. 37 

Answer- 32

Que- On the Kelvin scale, the melting point of ice is 

a. 373K 

b. 100K 

c. 273K 

d. 0 K 

Answer- 273K

Que- The temperature which has the same reading on both Fahrenheit and Celsius scales is 

a. 40° 

b. –40° 

c. 0° 

d. 32° 

Answer- –40°

Que- 'Farad' is the unit of : 

a. Capacitance 

b. Inductance 

c. Resistance 

d. Conductance 

Answer- Capacitance

Que- Which of the following have the same unit ? 

a. Work and power 

b. Torque and moment of inertia 

c. Work and torque 

d. Torque and angular momentum 

Answer- Work and torque

Que- Kilohertz is a unit which measures 

a. Electromagnetic radio wave frequencies 

b. Electric resistance 

c. Power used by a current of one ampere 

d. Voltage 

Answer- Electromagnetic radio wave frequencies

Que- What is the unit of the physical quantity "Inductance"? 

a. Weber 

b. Farad 

c. Henry 

d. Tesla 

Answer- Henry

Que- Pycnometer is an instrument used to measure the 

a. Density 

b. Intensity of solar radiation 

c. Intensity of earthquake 

d. High temperatures 

Answer- Density

Que- Ohm's law is valid in case of 

a. Semiconductor 

b. Conductor 

c. Superconductor 

d. Insulator 

Answer- Conductor

Que- Electrical burns occur principally because of 

a. Radiation pulses of the electricity 

b. The heat generated by the flow of electrical current through the body 

c. The high energy of electrons 

d. All of the above 

Answer- The heat generated by the flow of electrical current through the body

Que- The SI unit of resistance is: 

a. Newton 

b. Coulomb 

c. Ohm 

d. Joule 

Answer- Ohm

Que- Electrical Energy is the energy of 

a. Protons 

b. Neutrons 

c. Electrons 

d. All the above 

Answer- Electrons

Que- As water is cooled from 4 deg C to 0 deg C, its density 

a. Increases 

b. Decreases 

c. Remains same 

d. None of the above 

Answer- Decreases

Que- Sound waves in air are 

a. transverse 

b. longitudinal 

c. electromagnetic 

d. polarised 

Answer- longitudinal

Que- Magnetism at the centre of a bar magnet is 

a. minimum 

b. maximum 

c. zero 

d. minimum or maximum 

Answer- zero

Que- It is more difficult to walk on a sandy road than on a concrete road because 

a. sand is soft and concreter is hard. 

b. the friction between sand and feet is less than that between concrete and feet. 

c. the friction between sand and feet is more than that between concrete and feet. 

d. the sand is grainy but concrete is smooth. 

Answer- the friction between sand and feet is less than that between concrete and feet.

Que- Of the following properties of a wave, the one that is independent of the other is its 

a. amplitude 

b. velocity 

c. wavelength 

d. frequency 

Answer- amplitude

Que- A car parked in the sun with its windows closed gets terribly hot inside. This is due to  

a. The heat emitted by the engine 

b. The greenhouse effect 

c. The good conducting power of the metal body 

d. The double layered wind shield 

Answer- The greenhouse effect

Que- To measure the speed of an approaching car a police officer shines 

a. Light waves on it 

b. Microwaves on it 

c. Radio waves on it 

d. Ultra high frequency waves on it 

Answer- Radio waves on it

Que- The device used for measuring the wavelength of X-rays is 

a. G.M. Counter 

b. Cyclotron 

c. Bragg Spectrometer 

d. Mass Spectrometer 

Answer- Bragg Spectrometer

Que- If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths? 

a. LUV < lIR < lVIS 

b. LUV > lVIS > lIR 

c. LUV > lIR > lVIS 

d. LUV < lVIS < lIR 

Answer- LUV < lVIS < lIR

Que- Transition ions absorb light in : 

a. Infrared region 

b. Ultraviolet region 

c. Microwave region 

d. Visible region 

Answer- Visible region

Que- Pure water is bad conductor of electricity because it is 

a. Feebly ionized 

b. Not volatile 

c. A very good solvent 

d. A non-polar solvent 

Answer- Feebly ionized

Que- The metal whose electrical conductivity is more, is 

a. Copper 

b. Aluminium 

c. Silver 

d. Lead 

Answer- Silver

Que- Which of the following is a conductor of electricity ? 

a. Rubber 

b. Pure water 

c. Salt water 

d. Benzene 

Answer- Salt water

Que- A bird sitting on a high tension electric wire does not get electrocuted because 

a. It has high resistance 

b. The body is earthed 

c. It does not form a closed path for the flow of current 

d. Its feet are good insulators 

Answer- It does not form a closed path for the flow of current

Que- The fuse in our domestic electric circuit melts when there is a high rise in 

a. Inductance 

b. Current 

c. Resistance 

d. Capacitance 

Answer- Current

Que- Which compressor is usually used in AC? 

a. Centrifugal 

b. Rotary 

c. Reciprocating 

d. Axial 

Answer- Reciprocating

Que- The best material for the core of a transformer is 

a. Stainless steel 

b. Mild steel 

c. Hard steel 

d. Soft iron 

Answer- Soft iron

Que- A transformer works on the principle of 

a. Self induction 

b. Mutual induction 

c. Generator 

d. Inverter 

Answer- Mutual induction

Que- Transformer is a device to convert 

a. D.C. to A.C. 

b. Low voltage D.C. into high voltage D.C. 

c. Low voltage A.C. into high voltage A.C. 

d. Mechanical energy into Electrical energy 

Answer- Low voltage A.C. into high voltage A.C.

Que- Atomic hydrogen has a life period of 

a. One hour  

b. One day  

c. One minute  

d. A fraction of a second  

Answer- A fraction of a second 

Que- If cream is removed from milk, its density 

a. Increases 

b. Decreases 

c. Remains the same 

d. May increase or decrease 

Answer- Increases

Que- A falling drop of rain water acquires the spherical shape due to 

a. Viscosity 

b. Surface Tension 

c. Atmospheric pressure 

d. Gravitational force 

Answer- Surface Tension

Que- Why the needle of iron swims on water surface when it is kept gently ? 

a. It will remain under the water, when it will displace more water than its weight 

b. The density of needle is less than that of water 

c. Due to surface tension 

d. Due to its shape 

Answer- Due to surface tension

Que- Rise of oil a wick is due to 

a. Density of the oil 

b. Viscosity of the oil 

c. Surface tension of the oil 

d. Pressure of the oil 

Answer- Surface tension of the oil

Que- Bubbles of air rise up through liquids due to 

a. Surface tension and adherence 

b. Viscosity and buoyancy 

c. Air current over the liquid and buoyancy 

d. Up thrust and surface tension 

Answer- Viscosity and buoyancy

Que- What is refractive index ? 

a. It is defined as the ratio of speed of light in the medium to the speed of light in vacuum. 

b. It is defined as the product of speed of light in medium and in vacuum. 

c. It is defined as the ratio of speed of light in vacuum to the speed of light in the medium. 

d. None of above 

Answer- It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.

Que- A star appears twinkling in the sky because of 

a. Scattering of light by atmosphere 

b. Reflection of light by atmosphere 

c. Refraction of light by atmosphere 

d. Diffraction of light by atmosphere 

Answer- Refraction of light by atmosphere

Que- What type of lens is used in a magnifying glass 

a. Concave  

b. Plano-concave  

c. Convex  

d. None of the above  

Answer- Convex 

Que- Time of exposure required for taking photograph of an object depends upon the 

a. Brightness of the object 

b. Skill of photographer 

c. Proximity of object 

d. Size of the object 

Answer- Brightness of the object

Que- A concave lens always forms 

a. A real image 

b. A virtual image 

c. An image type which depends on object characteristics 

d. An image type which depends on lens curvature 

Answer- A virtual image

Que- The density of water is 1 g/c. This is strictly valid at 

a. 0°C 

b. 4°C 

c. 25°C 

d. 100°C 

Answer- 4°C

Que- Specific gravity is defined as the ratio of 

a. Density of the substance to the density of water 

b. Density of the substance to the density of water at 0°C 

c. Density of water at 4°C to the density of the substance 

d. Density of the substance to the density of water at 4°C 

Answer- Density of the substance to the density of water

Que- The cause for the Tsunami, as deduced by the seismologists, is 

a. Gravitational pull of the moon 

b. Low pressure trough in the ocean 

c. Deformation of sea floor and vertical displacement of water 

d. Sudden change in the monsoon wind 

Answer- Deformation of sea floor and vertical displacement of water

Que- Which statement best describes an igneous intrusion? 

a. Igneous intrusion for when ice crystals splash into lava 

b. Magma is injected into surrounding rock forming an igneous intrusive 

c. Magma is exported to an open area and forms iron 

d. Magma explodes to the surface and forms a smooth outer layer of rock 

Answer- Magma is injected into surrounding rock forming an igneous intrusive

Que- Which is a common first indicator of an approaching thunderstorm? 

a. Too hot 

b. Heavy wind 

c. A buildup of dark clouds 

d. Lightning 

Answer- A buildup of dark clouds

Que- Necessary element of change in solar energy to electrical energy 

a. Berillium 

b. Silicon 

c. Tantelum 

d. Pure Copper 

Answer- Silicon

Que- In hydro power station, the motion produced in turbines is due to 

a. Flow of water 

b. Burning of coal 

c. Burning of diesel 

d. Production of steam 

Answer- Flow of water

Que- The SI unit for measuring work and energy is 

a. Joule  

b. Watt  

c. Farad  

d. Ohm  

Answer- Joule 

Que- In a rechargeable cell what kind of energy is stored within the cell? 

a. Electrical energy 

b. Potential energy 

c. Chemical energy 

d. Kinetic energy 

Answer- Chemical energy

Que- A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is 

a. Zero 

b. One 

c. Less than one 

d. More than one 

Answer- Zero

Que- The ''four stroke petrol engine' is based on 

a. Carnot-cycle 

b. Otto-cycle 

c. Diesel-cycle 

d. Boyle's-cycle 

Answer- Otto-cycle

Que- The spring balance works on the principle of ________ . 

a. Boyle's Law 

b. Hooke's Law 

c. Bernoulli's principle 

d. Pascal's Law 

Answer- Hooke's Law

Que- A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ? 

a. Increase 

b. Dacrease 

c. Remain constant 

d. Will increase first and then dcrease 

Answer- Increase

Que- Air is said to be saturated when 

a. Its pressure is minimum 

b. It contains the maximum content of water vapour 

c. Its thickness is maximum 

d. It blows over the barren land 

Answer- It contains the maximum content of water vapour

Que- At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature. It is the statement of 

a. Boyle's Law  

b. Charle's Law  

c. Gay-Lussac's Law  

d. Avogadro's Law  

Answer- Charle's Law 

Que- During hot weather, the fan produces a feeling of comfort. This is because 

a. Fan supplies cool air 

b. Fan cools the air 

c. Our perspiration eva-porates rapidly 

d. Conductivity of air increases 

Answer- Our perspiration eva-porates rapidly

Que- The flow of thermal energy is called 

a. Heat 

b. Current 

c. Voltage 

d. Potential 

Answer- Heat

Que- On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because : 

a. Metals have higher thermal capacity than plastics 

b. Plastics have a lower density than metals 

c. Metals are good conductors of heat 

d. Plastics have a higher thermal conductivity than metals 

Answer- Metals are good conductors of heat

Que- Which of the following is an insulator? 

a. Mercury 

b. Carbon 

c. Germanium 

d. Glass 

Answer- Glass

Que- 'Therm' is the unit of 

a. Power 

b. Heat 

c. Light 

d. Distance 

Answer- Heat

Que- What is the minimum escape velocity of rocket to be launched into space ? 

a. 5 Km/Sec. 

b. 6 Km/Sec. 

c. 11 Km/Sec. 

d. 15 Km/Sec. 

Answer- 11 Km/Sec.

Que- The period of revolution of a geostationary satellite is 

a. 365 days 

b. 30 days 

c. 24 hours 

d. Changing continuously 

Answer- 24 hours

Que- The laws which govern the motion of planets are called ________  

a. Newton's Laws 

b. Kepler's Laws 

c. Avogadro's laws 

d. De Morgan's Laws 

Answer- Kepler's Laws

Que- Who gave the Theory of Relativity? 

a. Isaac Newton 

b. Archimedes 

c. Albert Einstein 

d. Galileo Galilei 

Answer- Albert Einstein

Que- Which of the following was the first theory of superconductivity? 

a. Ginzburg Landau theory 

b. London theory 

c. Resonating valence bond theory 

d. Quantum field theory 

Answer- London theory

Que- A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be 

a. P 

b. < P 

c. > P 

d. 2P 

Answer- > P

Que- A wire carrying current is 

a. Positively charged 

b. Negatively charged 

c. Neutral 

d. Charged with a type depending upon current strength 

Answer- Neutral

Que- Carbon Arc lamps are commonly used in 

a. Cinema projectors 

b. Photography 

c. Vehicles 

d. Domestic lighting 

Answer- Cinema projectors

Que- A gas thermometer is more sensitive than a liquid thermometer because a gas : 

a. Is lighter than liquid 

b. Expands more than a liquid 

c. Is easy to obtain 

d. Does not change state easily 

Answer- Expands more than a liquid

Que- What is the SI unit of temperature? 

a. Kelvin 

b. Joule 

c. Celsius 

d. Fahrenheit 

Answer- Kelvin

Que- Earliest thermometer was developed by 

a. Celsius 

b. Fahrenheit 

c. Kelvin 

d. Galileo 

Answer- Galileo

Que- The absolute zero is a temperature at which ________  

a. Molecular motion in a gas would cease 

b. Water freezes 

c. All gases become liquid 

d. All gases become solid 

Answer- Molecular motion in a gas would cease

Que- Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be 

a. At a higher level in water 

b. At a higher level in alcohol 

c. At the same level in both 

d. Floating in alcohol and sinking in water 

Answer- At a higher level in water

Que- Which of the following characteristics of light remains unchanged when light travels from vaccum enters water? 

a. Speed  

b. Amplitude  

c. Frequency  

d. Wavelength  

Answer- Frequency 

Que- To resolve an object in an electron microscope, 

a. The wavelength of the electrons must be close to the diameter of the object 

b. The wavelength of the electrons must be greater than the diameter of the object. 

c. Both A & B 

d. None of the above 

Answer- The wavelength of the electrons must be close to the diameter of the object

Que- Which of the following is an example of continous emission spectrum? 

a. Spectrum of an oil frame 

b. Spectrum of a water 

c. Both 

d. None 

Answer- Spectrum of an oil frame

Que- The atmospheric layer reflecting radio waves is called 

a. Ozonosphere 

b. Ionosphere 

c. Stratosphere 

d. Mesosphere 

Answer- Ionosphere

Que- For a ray of light to suffer total internal reflection it has to pass from : 

a. Glass to water 

b. Water to glass 

c. Air to water 

d. Air to glass 

Answer- Air to water

Que- Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to: 

a. The heating effect of current alone 

b. Hysteresis loss alone 

c. Both the heating effect of current and hysteresis loss 

d. Intense sunlight at noon 

Answer- Both the heating effect of current and hysteresis loss

Que- Nuclear sizes are expressed in a unit named 

a. Fermi 

b. Angstrom 

c. Newton 

d. Tesla 

Answer- Fermi

Que- Light year is a unit of 

a. Time 

b. Distance 

c. Light 

d. Intensity of light 

Answer- Distance

Que- Mirage is due to: 

a. Unequal heating of different parts of the atmosphere 

b. Magnetic disturbances in the atmosphere 

c. Depletion of ozone layer in the atmosphere 

d. Equal heating of different parts of the atmosphere 

Answer- Unequal heating of different parts of the atmosphere

Que- Light from the Sun reaches us in nearly 

a. 2 minutes 

b. 4 minutes 

c. 8 minutes 

d. 16 minutes 

Answer- 8 minutes

Que- A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is  

a. Greater than the weight of the man 

b. Less than the weight of the man 

c. Same as the weight of the man 

d. Zero 

Answer- Greater than the weight of the man

Que- Who defined the law of gravitation ? 

a. Newton 

b. Archimedes 

c. Galileo 

d. Faraday 

Answer- Newton

Que- It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement? 

a. Law of inertia 

b. Newton's second law 

c. Newton's third law 

d. Pascal's law 

Answer- Newton's third law

Que- In the Earth, the weight of a body is maximum at the 

a. North Pole 

b. South Pole 

c. Equator 

d. Surface 

Answer- Surface

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