Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Physics MCQ (Multiple Choice Questions)

 Que- The layer of atmosphere used for radio-wave transmission is 

a. Chromosphere 

b. Troposphere 

c. Ionosphere 

d. Stratosphere 

Answer- Ionosphere

Que- What frequency range is the high frequency band? 

a. 3 kHz 

b. 3 to 30 MHz 

c. 30 to 300 MHz 

d. 10 GHz 

Answer- 3 to 30 MHz

Que- In an optical fibre the signal is transmitted 

a. In a straight line path 

b. In a curved path 

c. Due to total internal reflection 

d. Due to refraction 

Answer- Due to total internal reflection

Que- A real gas can act as an ideal gas in 

a. High pressure and low temperature 

b. Low pressure and high temperature 

c. High pressure and high temperature 

d. Low pressure and low temperature 

Answer- Low pressure and high temperature

Que- The instrument that measures and records the relative humidity of air is 

a. Hydrometer 

b. Hygrometer 

c. Lactometer 

d. Barometer 

Answer- Hygrometer

Que- If there is a circular hole in a metal plate, what happens to the radius of the hole when the plate is heated? 

a. Increases 

b. Decreases 

c. Unchanged 

d. Depends upon the metal 

Answer- Increases

Que- Which of the following device is best suited for measuring the temperature inside metallurgical furnaces? 

a. Pyrometer 

b. Thermocouple 

c. Thermometer 

d. Thermistor 

Answer- Pyrometer

Que- Skids occur when the brakes are applied so hard that the front or rear wheels lose traction are called as 

a. Cornering 

b. Blowout 

c. Power 

d. Braking 

Answer- Braking

Que- During the motion of a projectile fired from the earth surface, ________  

a. Its kinetic energy remains constant 

b. Its momentum remains constant 

c. Vertical component of its velocity remains constant 

d. Horizontal component of its velocity remains constant 

Answer- Horizontal component of its velocity remains constant

Que- What property of matter is momentum related to? 

a. Mass 

b. Velocity 

c. Both A & B 

d. None of the above 

Answer- Both A & B

Que- The swing of a spinning cricket ball in air can be explained on the basis of 

a. Sudden change in wind direction. 

b. Buoyancy of air. 

c. Turbulence caused by wind. 

d. Bernoulli's theorem. 

Answer- Turbulence caused by wind.

Que- What will happen if an object is dropped from a height and there is no air resistance? 

a. It will fall with a constant speed and acceleration 

b. Its acceleration will increase 

c. Both speed and acceleration will increase 

d. Its speed will increase 

Answer- Its speed will increase

Que- Heat flows as a result of difference of ________  

a. Temperature 

b. Density 

c. Mass 

d. Volume 

Answer- Temperature

Que- Light beam which is highly directional is called: 

a. Eraser 

b. Grazer 

c. Maser 

d. Laser 

Answer- Laser

Que- Speed of light is maximum in ________  

a. Vacuum 

b. Solids 

c. Liquids 

d. Gases 

Answer- Vacuum

Que- Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is 

a. Of variable refractive index 

b. Made up of slabs of different refractive indices 

c. Homogeneous and transparent 

d. Inhomogeneous and transparent 

Answer- Homogeneous and transparent

Que- The speed of light will be minimum while passing through 

a. Water 

b. Vaccum 

c. Air 

d. Glass 

Answer- Glass

Que- Who among the following is credited for the Corpuscular theory of light? 

a. Isaac Newton 

b. Christiaan Hyugens 

c. Albert Einstein 

d. James Clerk Maxwell 

Answer- Isaac Newton

Que- The word "Physics" comes from the Greek word 

a. Phiji  

b. Fusis  

c. Phusik  

d. None of the above  

Answer- Fusis 

Que- Which of the following events occurred first ? 

a. Albert Einstein propounded the General Theory of Relativity 

b. Max Planck unveiled the Quantum Theory 

c. Marconi first tranmitted a wireless signal 

d. Madame Marie Curie became the first woman Nobel Prize winner 

Answer- Max Planck unveiled the Quantum Theory

Que- Who among the following is credited to work for the unification of electricity, magnetism and optics field of Physics? 

a. James Clerk Maxwell 

b. Michael Faraday 

c. Haris Christian Oersted 

d. Isaac Newton 

Answer- James Clerk Maxwell

Que- What is the range of masses involved in the study of Physics? 

a. 10-19 kg to 1038 kg 

b. 10-30 kg to 1055 kg 

c. 10-30  kg to 1030 kg 

d. 10-19 kg to 1055 kg 

Answer- 10-30 kg to 1055 kg

Que- The mass of a star is two times the mass of the Sun. How it will come to an end ? 

a. Neutron Star 

b. Black hole 

c. White Dwarf 

d. Red Giant 

Answer- Neutron Star

Que- Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy ? 

a. Earth 

b. Moon 

c. Venus 

d. Saturn 

Answer- Moon

Que- The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be: 

a. 8 T 

b. 4 T 

c. 1 T 

d. 2 T 

Answer- 8 T

Que- Which is evidence that supports the dynamo theory? 

a. Earth's outer core contains liquid that conducts electricity 

b. Earth's core contains a large amount of iron 

c. Granite and basalt conduct electricity 

d. Convection occurs in Earth's inner core 

Answer- Earth's core contains a large amount of iron

Que- Which of the following is indicated by the colour of a star ? 

a. Weight 

b. Distance 

c. Temperature 

d. Size 

Answer- Temperature

Que- When a card placed over a tumbler is flicked with the finger, the coin placed over it falls in the tumbler. 

a. Law of conservation of energy 

b. Newton's third law of motion 

c. Law of Inertia 

d. Law of conservation of momentum 

Answer- Law of Inertia

Que- According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ________ of an object. 

a. Density 

b. Volume 

c. Force 

d. Mass 

Answer- Mass

Que- Why does a cannon recoil after firing ? 

a. Conservation of energy 

b. Backward thrust of gases produced 

c. Newton's third law of motion 

d. Newton's first law of motion 

Answer- Newton's third law of motion

Que- A body of mass 5 kg accelerates from 12 m/s to 20 m/s in 4 seconds due to the application of a force on it. Calculate the magnitude of this force (in N). 

a. 40 

b. 10 

c. 20 

d. 80 

Answer- 10

Que- Which one of the following processes is responsible for the glittering of air bubble rising through water? 

a. Reflection of light 

b. Refraction of light 

c. Total internal reflection of light 

d. Scattering of light 

Answer- Total internal reflection of light

Que- The increasing order of the refractive index of certain materials is (left to right) ________  

a. Rocksalt, Benzene, Kerosene, Ice 

b. Rock Salt, Ice, Benzene, Kerosene 

c. Ice, Kerosene, Benzene, Rock Salt 

d. Kerosene, Ice, Benzene, Rock Salt 

Answer- Ice, Kerosene, Benzene, Rock Salt

Que- Which color deviates least when passing through a Prism 

a. Blue  

b. Green  

c. Yellow  

d. Red  

Answer- Red 

Que- Which color deviates highest when passing through a Prism 

a. Indigo  

b. Green  

c. Violet  

d. Orange  

Answer- Violet 

Que- A pond of water appears less deep due to 

a. Reflection 

b. Diffraction 

c. Refraction 

d. Polarisation 

Answer- Refraction

Que- A mirage occurs because of 

a. Reflection by hot ground 

b. Total internal reflection by layers of air 

c. Interference of light 

d. Diffraction of light 

Answer- Total internal reflection by layers of air

Que- Optical fibres are based on the phenomenon of 

a. Interference 

b. Dispersion 

c. Diffraction 

d. Total Internal Reflection 

Answer- Total Internal Reflection

Que- The angle between the ________ and the incident ray is called the angle of incidence. 

a. Surface 

b. Normal 

c. Tangent 

d. Reflected ray 

Answer- Normal

Que- A periscope works by the principle of 

a. Total internal reflection 

b. Refraction 

c. Diffraction 

d. Reflection 

Answer- Total internal reflection

Que- A periscope works on the principle of 

a. Refraction 

b. Total internal reflection 

c. Diffraction 

d. Reflection 

Answer- Total internal reflection

Que- Why is it difficult to breathe at higher altitudes? 

a. Due to low air pressure 

b. Due to low temperature 

c. Due to ozone 

d. Due to high humidity 

Answer- Due to low air pressure

Que- The Hydraulic Break works on the principle of ________ . 

a. Pascal's Law 

b. Boyle's law 

c. Coulomb's law 

d. Bernouli's law 

Answer- Pascal's Law

Que- Hydraulic brakes work on the principle of 

a. Thomson's law 

b. Newton's law 

c. Bernoulli's theorem 

d. Pascal's law 

Answer- Pascal's law

Que- What principle/law explains the working of the hydraulic brakes in automobiles ? 

a. Bernoulli's law 

b. Posieulle's principle 

c. Pascal's law 

d. Archimedes' principle 

Answer- Pascal's law

Que- Air moves from the region where the air ________  

a. Humidity is high to the region where the humidity is low 

b. Pressure is low to the region where the pressure is high 

c. Pressure is high to the region where the pressure is low 

d. Humidity is low to the region where the humidity is high 

Answer- Pressure is high to the region where the pressure is low

Que- What is the SI unit of intensity of sound? 

a. Decibel 

b. Newton 

c. Heartz 

d. Tesla 

Answer- Decibel

Que- Sound cannot pass through 

a. Water 

b. Steel 

c. Air 

d. Vacuum 

Answer- Vacuum

Que- Sound waves cannot travel in 

a. Vacuum 

b. Water 

c. Glass 

d. Hydrogen gas 

Answer- Vacuum

Que- The quality or tone of a musical sound produced by a stringed instrument depends on 

a. Frequency of vibration 

b. Length of the strings in the instrument 

c. Amplitude of vibration 

d. Wave form of the sound 

Answer- Wave form of the sound

Que- Which determines the frequency of a sound wave? 

a. Amplitude 

b. Speed 

c. Source 

d. Medium 

Answer- Amplitude

Que- Which is an example of Phototropism? 

a. Roots of a plant following water 

b. Plant bending toward the light 

c. Roots growing into the soil 

d. A venus flytrap capturing a fly 

Answer- Plant bending toward the light

Que- Light travels fastest in 

a. Air 

b. Water 

c. Glass 

d. Diamond 

Answer- Air

Que- Light travels slowest in 

a. Glass 

b. Water 

c. Air 

d. Vacuum 

Answer- Glass

Que- An image formed by a plane mirror, that cannot be obtained on a screen is called ________  

a. Virtual image 

b. Real image 

c. Inverted image 

d. Erect image 

Answer- Virtual image

Que- The type of mirror used in automobiles to see the traffic on the rear side is 

a. Concave 

b. Plano-Convex 

c. Plane 

d. Convex 

Answer- Convex

Que- If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is: 

a. Concave mirror 

b. Convex mirror 

c. Plano-concave mirror 

d. Plane mirror 

Answer- Convex mirror

Que- Which one of the following reflects back more sunlight as compared to other three? 

a. Sand desert 

b. Land covered with fresh snow 

c. Prairie land 

d. Paddy crop land 

Answer- Land covered with fresh snow

Que- After reflection from a plane mirror the word will look like. 






Que- Convex mirror is generally used in ________  

a. Solar cookers 

b. Opthalmoscope 

c. Reflector for head light 

d. Rear view mirror 

Answer- Rear view mirror

Que- Which physical quantity is measured in 'siemens'? 

a. Electric potential 

b. Electrical conductance 

c. Magnetic flux 

d. Refractive index 

Answer- Electrical conductance

Que- Hydroscope is an instrument that shows changes in: 

a. Sound under water 

b. Atmospheric humidity 

c. Density of liquid 

d. None of these 

Answer- None of these

Que- Unit of impedance is ________  

a. Ohm 

b. Henry 

c. Tesla 

d. Hertz 

Answer- Ohm

Que- Stress can be defined as ________ quantity. 

a. Scalar 

b. Vector 

c. Phasor 

d. Tensor 

Answer- Tensor

Que- In spherical polar coordinates (l, q, a), q denotes the polar angle around z-axis and a denotes the azimuthal angle raised from x-axis . Then the y-component of P is given by 

a. Psinq sina 

b. Psinq cosa 

c. Pcosq sina 

d. Pcosq cosa 

Answer- Psinq sina

Que- Which sources produce alternating current (AC)? 

a. Solar power plants 

b. Hydro-electric generators 

c. Batteries 

d. All of the above 

Answer- Hydro-electric generators

Que- Alternating current is converted into direct current by a 

a. Transformer 

b. Dynamo 

c. Oscillator 

d. Rectifier 

Answer- Rectifier

Que- A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become 

a. C 

b. C/7 

c. 7C 

d. 14C 

Answer- 7C

Que- A parallel-plate capacitor of capacitance C1 is made using two gold plates. Another parallel-plate capacitor of capacitance C2 is made using two aluminium plates with same plate separation, and all the four plates are of same area. If rg and ra are respectively the electrical resistivities of gold and aluminium, then which one of the following relations is correct? 

a. C1>C2 

b. C2>C1 

c. C1pa = C2pg 

d. C1 = C2 

Answer- C1 = C2

Que- Two vectors are said to be equal if 

a. Only their magnitudes are same 

b. Only their directions are same 

c. Both magnitude and direction are same 

d. Magnitudes are same but directions are opposite 

Answer- Both magnitude and direction are same

Que- Which of the following is a vector quantity? 

a. Area  

b. Power  

c. Electric Current  

d. Energy  

Answer- Area 

Que- Which of the following is not a vector quantity? 

a. Acceleration  

b. Density  

c. Displacement  

d. Impulse  

Answer- Density 

Que- Which of the following is not a vector quantity ? 

a. Speed 

b. Velocity 

c. Torque 

d. Displacement 

Answer- Speed

Que- These waves cannot be transmitted through vacuum. 

a. Light 

b. Sound 

c. Heat 

d. Electromagnetic 

Answer- Sound

Que- The snow on the mountains does not melt all at once when it is heated by the sun because: 

a. It becomes very hard 

b. It reflects most of the heat from the sun 

c. It has a low specific heat capacity 

d. It has a high latent heat of fusion 

Answer- It reflects most of the heat from the sun

Que- Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly 

a. Absorb heat from the atmosphere send it towards earth 

b. Prevent cold waves from the sky descending on earth 

c. Reflect back the heat given by earth 

d. Produce heat and radiate it toward earth 

Answer- Reflect back the heat given by earth

Que- In which one of the following the phenomenon of total internal reflection of light is used ? 

a. Formation of mirage 

b. Working of binoculars 

c. Formation of rainbow 

d. Twinkling of stars 

Answer- Formation of mirage

Que- Which type of mirror is used in the head lights of vehicles ? 

a. Plane mirror 

b. Concave mirror 

c. Convex mirror 

d. Parabolic mirror 

Answer- Concave mirror

Que- If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used? 

a. Concave 

b. Convex 

c. Cylindrical 

d. Plane 

Answer- Concave

Que- Radioactive elements can be traced out in living cell through a technique called 

a. Centrifugation 

b. Chromatography 

c. Auto radiography 

d. All the above 

Answer- Auto radiography

Que- The radiant energy having lowest energy is 

a. Gamma rays 

b. UV rays 

c. Visible light 

d. Microwave radiation 

Answer- Microwave radiation

Que- The mercury and sodium street lamps light up because of : 

a. Atomic emission 

b. Atomic absorption 

c. Electron emission 

d. Electron absorption 

Answer- Atomic emission

Que- Nuclear Reactors are based on which of the following phenomenon? 

a. Magnetic confinement of Plasma 

b. Nuclear Fusion 

c. Controlled Nuclear Fission 

d. None of the above 

Answer- Controlled Nuclear Fission

Que- Which type of radiation has the lowest penetrating ability? 

a. Alpha 

b. Beta 

c. Gamma 

d. All of the above 

Answer- Alpha

Que-  ________ states that internal energy is a function of state and the increase in internal energy is equal to the sum of the heat supplied to system and work done by the system. 

a. First law of thermodynamics 

b. Hooke's Law 

c. The coulomb's law 

d. Faraday's Law 

Answer- First law of thermodynamics

Que- Which phase change is an example of an exothermic process? 

a. Liquid to Solid 

b. Gas to Solid 

c. Gas to Liquid 

d. All the above 

Answer- All the above

Que- The velocity of heat radiation in vacuum is 

a. Equal to that of light 

b. Less than that of light 

c. Greater than that of light 

d. Equal to that of sound 

Answer- Equal to that of light

Que- In a Carnot engine when heat is taken from the source, its temperature 

a. Remains constant  

b. Decreases  

c. Increases  

d. Decreases and then remains constant  

Answer- Remains constant 

Que- Even after sunset, the air near the Earth's surface continue to receive heat due to 

a. Insolation 

b. Terrestrial Radiation 

c. Conduction 

d. Convection 

Answer- Terrestrial Radiation

Que- A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ? 

a. Both the spheres will reach the ground simultaneously. 

b. A will reach the ground first. 

c. B will reach the ground first. 

d. The question is incomplete because the masses of the spheres are not given. 

Answer- Both the spheres will reach the ground simultaneously.

Que- Two stones of unequal masses are thrown vertically up with the same velocity. Which of the following will happen? 

a. The heavier mass will reach greater height 

b. The lighter mass will reach greater height 

c. Both will reach the same height 

d. Any of them may reach greater height 

Answer- Both will reach the same height

Que- The dimension of which of the following is the same as that of impulse ? 

a. Volume 

b. Momentum 

c. Torque 

d. Change in the rate of momentum 

Answer- Momentum

Que- An object covers distance which is directly proportional to the square of the time. Its accelaration is 

a. Increasing 

b. Decreasing 

c. Zero 

d. Constant 

Answer- Constant

Que- The velocity of sound in moist air is more than in dry air because the moist air has 

a. Less density than dry air. 

b. Less pressure than dry air. 

c. More pressure than dry air. 

d. More density than dry air. 

Answer- Less density than dry air.

Que- Which one among the following doesn't have any effect on velocity of sound ? 

a. Pressure 

b. Temperature 

c. Humidity 

d. Density 

Answer- Humidity

Que- Velocity of sound in air does not change with the change of 

a. Temperature of air 

b. Pressure of air 

c. Moisture content in air 

d. Wind in the direction of propagation of sound 

Answer- Pressure of air

Que- The propagation of sound waves in a gas involves 

a. Adiabatic compression and rarefaction 

b. Isothermal compression and rarefaction 

c. Isochoric compression and rarefaction 

d. Isobaric compression and rarefaction 

Answer- Adiabatic compression and rarefaction

Que- When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon is known as  

a. Doppler effect 

b. Beats 

c. Resonance 

d. Echo 

Answer- Beats

Que- The oil in the wick of lamp rises due to 

a. Pressure difference 

b. Phenomenon of capillarity 

c. Low viscosity of oil 

d. Force of cohesion 

Answer- Phenomenon of capillarity

Que- Which of the following devices can be used to detect radiant heat ? 

a. Liquid thermometer 

b. Six's maximum and minimum thermometer 

c. Constant volume air thermometer 

d. Thermopile 

Answer- Thermopile

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