Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Physics MCQ (Multiple Choice Questions)

 Que- Tensional forces normally cause which one of the following? 

a. Normal faults 

b. Strike-slip faults 

c. Thrust faults 

d. Reverse faults 

Answer- Normal faults

Que- Amount of water vapour in the atmosphere is measured in terms of 

a. Humidity 

b. Droplets 

c. Smog 

d. All of the above 

Answer- Humidity

Que- For an ideal gas, which one of the following statements does not hold true? 

a. The speed of all gas molecules is same 

b. The kinetic energies of all gas molecules are not same 

c. The potential energy of the gas molecules is zero 

d. There is no interactive force between the molecules. 

Answer- The speed of all gas molecules is same

Que- Due to temperature variation along a conductor, potential variation occurs along it. This phenomenon is known as 

a. Thomson effect  

b. Joule effect  

c. Seebeck effect  

d. Peltier effect  

Answer- Thomson effect 

Que- The transport phenomenon occurs only in ________ state of a gas and is ________  

a. Non-equilibrium, irreversible 

b. Non-equilibrium, reversible 

c. Equilibrium, irreversible 

d. Equilibrium, reversible 

Answer- Equilibrium, irreversible

Que- For which one of the following, ''Diodes" are generally used for? 

a. Rectification 

b. Amplification 

c. Modulation 

d. Filtration 

Answer- Rectification

Que- The width of depletion layer of a P-N junction 

a. Decreases with light doping 

b. Increases with heavy doping 

c. Is independent of applied voltage 

d. Is increased under reverse bias 

Answer- Is increased under reverse bias

Que- The impurity atoms with which silicon should be doped to make p-type semiconductors are 

a. Phosphorus  

b. Antimony  

c. Boron  

d. Germanium  

Answer- Boron 

Que- Which of the following is used for regulated electric supply ? 

a. Zener diode 

b. Junction diode 

c. Gun diode 

d. Tunnel diode 

Answer- Zener diode

Que- A NOT gate can be implemented by: 

a. A single diode 

b. Two diodes 

c. A single resistor 

d. A single transistor 

Answer- A single transistor

Que- In which form is the supplied heat energy stored during change in temperature of substance? 

a. Heat energy 

b. Kinetic energy 

c. Potential energy 

d. Both kinetic and potential energy 

Answer- Kinetic energy

Que- What is another name for energy of motion? 

a. Motional energy 

b. Potential energy 

c. Kinetic energy 

d. Rotational energy 

Answer- Kinetic energy

Que- The rate at which energy is transferred is called 

a. Power 

b. Watt 

c. Volt 

d. Potential 

Answer- Power

Que- An object with a mass of 22 kg moving with a velocity of 5 m/s possesses a kinetic energy of : 

a. 275 J 

b. 110 J 

c. 2750 J 

d. 110 J 

Answer- 275 J

Que- In which of the following processes is energy released ? 

a. Respiration 

b. Photosynthesis 

c. Ingestion 

d. Absorption 

Answer- Respiration

Que- Which one of the following is not a property of electromagnetic waves? 

a. Electromagnetic waves do not show interference and diffraction. 

b. Oscillating electric field and magnetic field are perpendicular to each other. 

c. Electromagnetic waves are transverse waves 

d. Electromagnetic waves do not require a medium to propagate. 

Answer- Electromagnetic waves do not show interference and diffraction.

Que- Which one of the waves have the longest wavelength 

a. Violet  

b. Red  

c. Blue  

d. Green  

Answer- Red 

Que- Remote-sensing device has an inbuilt source of 

a. X-ray 

b. G-ray 

c. Ultraviolet ray 

d. Infrared ray 

Answer- Infrared ray

Que- Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength. 

a. Microwave, infrared, visible. X-rays 

b. X -rays, visible, infrared, microwave 

c. Visible, infrared, microwave, X-rays 

d. X - rays, infrared, visible, microwave 

Answer- X - rays, infrared, visible, microwave

Que- Which of the following has the shortest wavelength? 

a. Gamma rays 

b. Radio waves 

c. Microwaves 

d. Infrared rays 

Answer- Gamma rays

Que- The best conductor of electricity among the following is : 

a. Copper 

b. Iron 

c. Aluminium 

d. Silver 

Answer- Silver

Que- Kilowatt-hour is the unit of : 

a. Energy 

b. Power 

c. Force 

d. Momentum 

Answer- Energy

Que- Copper wires are generally used for electrical power transmission instead of iron wire because : 

a. Copper is cheaper than iron 

b. Copper is lighter than iron 

c. Copper is a better conductor of electricity than iron 

d. Copper can take higher power than iron 

Answer- Copper is a better conductor of electricity than iron

Que- The earth-wire of a cable is connected to 

a. The outer metallic body of the appliance 

b. The fuse of the appliance 

c. The filament of the appliance 

d. Short circuitry of the appliance 

Answer- The fuse of the appliance

Que- Lightning is caused due to 

a. Electric power 

b. Electric discharge 

c. Electric leak 

d. Electric pressure 

Answer- Electric discharge

Que- In a magnetic field, the direction of motion of a current carrying conductor is given by 

a. Maxwell's right hand rule  

b. Lenz's rule  

c. Flemings left hand rule  

d. Kirchoff's law  

Answer- Flemings left hand rule 

Que- The force between charged particles is called as: 

a. Nuclear Force 

b. Gravitational Force 

c. Centrifugal Force 

d. Electromagnetic Force 

Answer- Electromagnetic Force

Que- Moving electric charge produces : 

a. Magnetic field 

b. Sound waves 

c. Light rays 

d. Heat waves 

Answer- Magnetic field

Que- Nuclear sizes are expressed in a unit named 

a. Fermi 

b. Angstrom 

c. Newton 

d. Tesla 

Answer- Fermi

Que- Beta rays emitted by a radioactive material are 

a. The electrons orbiting around the nucleus 

b. Charged particles emitted by nucleus 

c. Neutral particles 

d. Electromagnetic radiations 

Answer- Charged particles emitted by nucleus

Que- Noise is measured in 

a. Watt 

b. REM 

c. Centigrade 

d. Decibel 

Answer- Decibel

Que- Man perceives sound vibrations in the frequency ranges of 

a. 0 – 5 Hz 

b. 6 – 10 Hz 

c. 11 – 20 Hz 

d. 20 – 20000 Hz 

Answer- 20 – 20000 Hz

Que- Instrument used to study the behaviour of a vibrating string is : 

a. Barometer 

b. Hydrometer 

c. Hygrometer 

d. Sonometer 

Answer- Sonometer

Que- Among the following materials sound travels fastest in 

a. Steel 

b. Air 

c. Vacuum 

d. Water 

Answer- Steel

Que- Sound becomes hazardous noise pollution at decibels? 

a. Above 120 db 

b. Above 80 db 

c. Above 50 db 

d. Above 30 db 

Answer- Above 120 db

Que- Who is known as the 'father of quantum theory'? 

a. Albert Einstein  

b. Max Planck  

c. Werner Heisenberg  

d. Ernest Rutherford  

Answer- Max Planck 

Que- Which of the following occurred first ? 

a. Albert Einstein propounded the General Theory of Relativity 

b. Max Planck unveiled the Quantum Theory 

c. Guglielmo Marconi sent out the first wireless signals 

d. Wright Brothers successfully flew an aircraft 

Answer- Guglielmo Marconi sent out the first wireless signals

Que- Which of the following is not a valid conservation law of classical physics? 

a. Law of conservation of energy 

b. Law of conservation of current 

c. Law of conservation of angular momentum 

d. Law of conservation of charge 

Answer- Law of conservation of current

Que- Who among the following gave the Uncertainty principle? 

a. R.A Milkman 

b. Ernset Rutherford 

c. S.N Bose 

d. Werner Heisenberg 

Answer- Werner Heisenberg

Que- Propagation of sound can be visualised as propagation of ________ variations in the medium 

a. Elasticity 

b. Viscosity 

c. Density 

d. Porosity 

Answer- Density

Que- Permissible noise level at Residential area during night time is : 

a. 45 dB (A) 

b. 55 dB (A) 

c. 75 dB (A) 

d. 80 dB (A) 

Answer- 45 dB (A)

Que- Which waves cannot be transmitted through vacuum? 

a. Electromagnetic 

b. Light 

c. Sound 

d. Heat 

Answer- Sound

Que- Submerged objects can be located using 

a. Radar 

b. Sonar 

c. Quasar 

d. Pulsar 

Answer- Sonar

Que- The Law of Kepler is related with which among the following ? 

a. Planetary Motion 

b. Law of Conservation of energy 

c. Law of Gravitation 

d. None 

Answer- Planetary Motion

Que- The term ''equinox' means 

a. The path which the Earthtakes around the Sun 

b. The axis of the Earth around which it rotates 

c. When the day and night are of equal duration 

d. The time when the Sun seems to be going round and round in the sky in the Arctic but does not go below the horizon 

Answer- When the day and night are of equal duration

Que- If the earth suddenly stop rotating, the value of "g" will be 

a. Same  

b. Increase  

c. Decrease  

d. Become Zero  

Answer- Increase 

Que- If an empty cylinder is half filled with a liquid, its center of gravity is  

a. Shifted upwards 

b. Shifted downwards 

c. Shifed neither upward nor downward 

d. Shifted upward or downward depending on the density of the liquid 

Answer- Shifted downwards

Que- Temperature of distant luminous bodies can be determined by 

a. Mercury thermometers 

b. Gas thermometers 

c. Pyrometers 

d. Colour thermometers 

Answer- Pyrometers

Que- The SI unit of luminous emittance is : 

a. Lux 

b. Candela 

c. Lumen 

d. Lumen second 

Answer- Lux

Que- The unit of measurement of noise is 

a. Decibel 

b. Hertz 

c. Amplifier 

d. Acoustics 

Answer- Decibel

Que- Which of the following pair is Incorrect? I. Parsec - Distance II. Barrel - Liquid III. Light year - Time 

a. Only III 

b. Only I and III 

c. Only II 

d. All are correct 

Answer- Only III

Que- Radian is used to measure 

a. Temperature 

b. Intensity of Flame 

c. Angle 

d. Solid Angle 

Answer- Angle

Que- What is the unit of the physical quantity Entropy? 

a. Watt per kelvin 

b. Newton per kelvin 

c. Pascal per kelvin 

d. Joule per kelvin 

Answer- Joule per kelvin

Que- What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero? 

a. Remains constant 

b. Becomes zero 

c. Increases exponentially 

d. None of the above 

Answer- Remains constant

Que- The force that keeps a body in a circular motion called  

a. The centripetal force 

b. The centrifugual force 

c. The frictional force 

d. All the above 

Answer- The centripetal force

Que- It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because 

a. Weights of buckets are balanced 

b. Centre of gravity falls within the body 

c. Centre of gravity and centre of equilibrium fall within the feet 

d. Resultant weight of buckets is zero 

Answer- Centre of gravity and centre of equilibrium fall within the feet

Que- The working of a rocket is based on the principle of: 

a. Conservation of momentum 

b. Conservation of mass 

c. Conservation of energy 

d. Conservation of angular momentum 

Answer- Conservation of momentum

Que- A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments 

a. Is zero 

b. Depends on the total mass of all the fragments 

c. Depends on the speeds of various fragments 

d. Is infinity 

Answer- Is zero

Que- Echolocation is an adaptation bats use to 

a. Locate flowering plants 

b. Hunt insects in flight 

c. Find warm places for hibernation 

d. All of the above 

Answer- All of the above

Que- Bats can sense obstacles because they produce 

a. Supersonic sound waves 

b. Ultrasonic sound waves 

c. Infrasonic sound waves 

d. Micro sound waves 

Answer- Ultrasonic sound waves

Que- A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an 

a. Audible wave 

b. Infrasonic wave 

c. Ultrasonic wave 

d. Microwave 

Answer- Audible wave

Que- Which term is not associated with sound wave? 

a. Hertz 

b. Decibel 

c. Candela 

d. Mach 

Answer- Candela

Que- Velocity of sound in air does not depend on 

a. Density of air 

b. Temperature of air 

c. Pressure of air 

d. Humidity of air 

Answer- Pressure of air

Que- Resistance of human body in dry condition 

a. 10 ohm 

b. 1000 ohm 

c. 10000 ohm 

d. 100000 ohm 

Answer- 100000 ohm

Que- The purpose of choke in a fluorescent lamp is : 

a. To increase the current flow 

b. To decrease the current flow 

c. To decrease the resistance 

d. Ro decrease the voltage momentarily 

Answer- To decrease the current flow

Que- An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct? 

a. Ve > Vp 

b. Ve < Vp 

c. Ve = Vp 

d. Cannot be determined 

Answer- Ve > Vp

Que- Superconductors are those elements 

a. Whose conductivity is intermediate between metals and insulators 

b. Whose resistance falls almost to zero at very low temperatures 

c. Which turn into insulators at very low temperatures 

d. Which conduct electricity only at super-high temperatures 

Answer- Whose resistance falls almost to zero at very low temperatures

Que- A device used for converting a.c. into d.c. is called 

a. Transformer 

b. Rectifier 

c. Induction coil 

d. Dynamo 

Answer- Rectifier

Que- Rate of doing work is called 

a. Capacity 

b. Energy 

c. Power 

d. Current 

Answer- Power

Que- The energy associated with motion is called 

a. Potential energy 

b. Kinetic energy 

c. Both A & B 

d. None of the above 

Answer- Kinetic energy

Que- The boiling point of water decreases at higher altitudes is due to 

a. Low temperature 

b. Low atmospheric pressure 

c. High temprature 

d. High atmospheric pressure 

Answer- Low atmospheric pressure

Que- At boiling point of liquids, its 

a. Temperature increases 

b. Atmospheric pressure increases 

c. Temperature remains constant 

d. Vapour pressure decreases 

Answer- Temperature remains constant

Que- Contact force is another name for ________  

a. Friction 

b. Magnetic force 

c. Electrostatic force 

d. Muscular force 

Answer- Muscular force

Que- The odometer guage indicates 

a. The distance travelled by a vehicle 

b. The depth of the ocean 

c. Pitch length 

d. Frequency of the wave 

Answer- The distance travelled by a vehicle

Que- If a force acts upon two objects at rest, and having different masses for the same amount of time, then which one of the following will be the same for both the objects? 

a. Acceleration 

b. Kinetic Energy 

c. Velocity 

d. Momentum 

Answer- Momentum

Que- Consider the following statements :  (01) There is no net moment on a body which is in equilibrium.  (02) The momentum of a body is always conserved.  (03) The kinetic energy of an object is always conserved. Which of the statements given above is/are correct? 

a. 1, 2 and 3 

b. 2 and 3 only 

c. 1 and 2 only 

d. 1 only 

Answer- 1 and 2 only

Que- The rate of change of linear momentum of a body falling freely under gravity is equal to it's ________ ? 

a. Kinetic Energy 

b. Weight 

c. Potential Energy 

d. Impulse 

Answer- Weight

Que- According to the theory of relativity, which of the following always remains constant ? 

a. Length of an object 

b. Time 

c. Space 

d. Velocity of light 

Answer- Velocity of light

Que- Total internal reflection can not take place when light goes from : 

a. Glass to water 

b. Water to glass 

c. Water to air 

d. Glass to air 

Answer- Water to glass

Que- A rear-view mirror for driving is 

a. Plain 

b. Concave 

c. Convex 

d. Inverted 

Answer- Convex

Que- The reflector of a search light is a : 

a. Convex mirror 

b. Concave mirror 

c. Plane mirror 

d. Cylindrical mirror 

Answer- Concave mirror

Que- Optical Fibre technology works on which of these principles of Physics? 

a. Bernoulli's Principle 

b. Newton's law of Motion 

c. Total internal reflection of Light 

d. Photoelectric effect 

Answer- Total internal reflection of Light

Que- What is the reason for formation of Mirage in desert? 

a. Refraction of light 

b. Reflection of light 

c. Total internal reflection of light 

d. Both Refraction and Total internal reflection of light 

Answer- Both Refraction and Total internal reflection of light

Que- Which elements are malleable and good conductors of electricity? 

a. Tin and silver 

b. Iodine and silver 

c. Tin and xenon 

d. Iodine and xenon 

Answer- Tin and silver

Que- What is the value of 1 kW = ? 

a. 1000 W 

b. 10 W 

c. 100 W 

d. 10000 W 

Answer- 1000 W

Que- The electric current in a metal wire is due to the flow of - 

a. Electrons 

b. Protons 

c. Ions 

d. Holes 

Answer- Electrons

Que- An electric fuse is based on 

a. The chemical effect of the current 

b. The magnetic effect of the current 

c. The heating effect of the current 

d. All of the above 

Answer- The heating effect of the current

Que- Metals are good conductors of electricity because 

a. The atoms are lightly packed 

b. They contain free electrons 

c. They have high melting point 

d. All the above 

Answer- They contain free electrons

Que- Find the current (in A) when a charge of 1200C flows in 6 seconds. 

a. 7200 

b. 200 

c. 100 

d. 3600 

Answer- 200

Que- Ventilators are provided near the ceiling of the room because 

a. The exhaled warmer air rises up and goes out 

b. These provide cross ventilation in the room 

c. These provide some sunlight in the room 

d. These do not look nice in the lower part 

Answer- These provide cross ventilation in the room

Que- Wollen clothes keep the body warm because 

a. Wool increases the temperature of the body 

b. Wool is a bad conductor 

c. Wool absorbs radiant heat from outer objects 

d. Wool rejects heat from the outer objects 

Answer- Wool is a bad conductor

Que- Plants are dried up in winter due to frost because 

a. Evaporation does not take place 

b. Photosynthesis does not take place at such low temperature 

c. Respiration does not take place at low temperature 

d. There is mechanical loss of tissues and drought condition prevails 

Answer- There is mechanical loss of tissues and drought condition prevails

Que- A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat? 

a. Conduction and convection only 

b. Conduction and radiation only 

c. Convection and radiation only 

d. Conduction, convection and radiation 

Answer- Conduction, convection and radiation

Que- In general, which is the cause of a land breeze? 

a. Pressure 

b. Heat 

c. Temperature 

d. None of the above 

Answer- Temperature

Que- Mist is caused by 

a. Dry ice 

b. Ice at low temperature 

c. Water vapour at low temperature 

d. Carbon-monoxide in solid form 

Answer- Water vapour at low temperature

Que- Which colour is the complementary colour of yellow ? 

a. Blue 

b. Green 

c. Orange 

d. Red 

Answer- Blue

Que- In sunlight a rose appears red. In green light, the same rose appears 

a. Red 

b. Black 

c. Green 

d. Yellow 

Answer- Black

Que- When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is 

a. Reflection of light 

b. Refraction of light 

c. Dispersion of light 

d. Scattering of light 

Answer- Scattering of light

Que- Which combination of color is the most convenient during day and night time ? 

a. Orange and blue 

b. White and black 

c. Yellow and blue 

d. Red and green 

Answer- Red and green

Que- An ideal gas cannot be 

a. Liquified 

b. Solidified 

c. Both A & B 

d. None of the above 

Answer- Liquified

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