# Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Que- Addition of suitable impurities into semiconductor, is called

a. Doping

b. Mixing

c. Forming

d. Diluting

Que- In a ________ the wave particles of the medium vibrate in a direction perpendicular to the direction of wave propagation

a. Longitudinal

b. Rolling

c. Transverse

d. Field

Que- Which of the following is the unit of perceived loudness of sound ?

a. Decibel

b. Sone

c. Hertz

d. Phon

Que- The component used for tuning a radio is basically a variable

a. Resisto

b. Condenser

c. Inductor

d. Transformer

Que- A wave with high amplitude have

a. High pitch

b. Low energy

c. High energy

d. Low pitch

Que- A standing wave occurs when

a. A wave reflects upon itself

b. The amplitude of a wave exceeds its wavelength

c. Two waves overlap

d. The speed of the wave is zero or near zero

Answer- A wave reflects upon itself

Que- Which of the following is a result of Surface tension ?

a. Gravitational pull

b. Viscosity

c. Capillary action

Que- A liquid disturbed by stirring comes to rest due to

a. Density

b. Surface tension

c. Viscosity

d. Centripetal force

Que- A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

a. Decreasing the radius of the capillary tube

b. Increasing the radius of the capillary tube

c. Increasing the height of water in the vessel

d. None of these

Que- Oil rises up the wick in a lamp because

a. Oil is very light

b. Of the diffusion of oil through the wick

c. Of the surface tension phenomenon

d. Of the capillary action phenomenon

Answer- Of the capillary action phenomenon

Que- An ice block with a piece of lead embeded in it floats in water. If ice melts the water level

a. Rises

b. Falls

c. Remains same

d. Falls first and then rises

Que- Supersonic plane fly with the speed

a. less than the speed of sound

b. of sound

c. greater than the speed of sound

d. of light

Answer- greater than the speed of sound

Que- Mach number is used in connection with the speed of

a. sound

b. aircraft

c. spacecraft

d. ships

Que- On a stationary sail boat, air is blown from a fan attached to the boat. The boat

a. moves in opposite direction in which the air is blown

b. does not move

c. moves in the same direction in which air blows

d. spins around

Que- Rainbow is due to

a. absorption of sunlight in minute water droplets

b. diffusion of sunlight through water droplets

c. ionisation of water deposits

d. refraction and reflection of sunlight by water droplets

Answer- refraction and reflection of sunlight by water droplets

Que- Stars which appear single to the naked eye but are double when seen through a telescope are

a. novas and supernovas

b. binaries

c. asteroids

d. quasars

Que- A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)

a. 0 J

b. 200 J

c. 400 J

d. 100 J

Que- The energy stored in a watch spring is

a. Kinetic energy

b. Potential energy

c. Heat energy

d. Chemical energy

Que- An object that has kinetic energy must be

a. At an elevated position

b. Falling

c. At rest

d. Moving

Que- A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]

a. 1568 J

b. 1568 C

c. 1568 W

d. 1568 N

Que- Hertz is the SI unit of

a. Weight

b. Power

c. Pressure

d. Frequency

Que- The velocity of the sound is highest in

a. Metal

b. Air

c. Water

d. Vacuum

Que- The ordinary and maximum tolerance limit of sound by human being is

a. 50 db to 70 db (decibel)

b. 60 db to 80 db (decibel)

c. 65 db to 75 db (decibel)

d. 70 db to 85 db (decibel)

Answer- 60 db to 80 db (decibel)

Que- In SONAR which kind of wave is used?

a. Infrasonic

b. Ultrasonic

d. Audible sound

Que- Sound waves cannot travel through

a. Gas

b. Liquid

c. Vacuum

d. Solid

Que- Hydraulic machines work under the Principle of :

a. Newton's Law

b. Joules Law

c. Pascal's Law

d. Floatation Law

Que- Alcohol is more volatile than water because ________ is lower than water.

a. Its boiling point

b. Its density

c. Its viscosity

d. Its surface tension

Que- A manometer is used to measure

a. Earthquake

b. Pressure

c. Temperature

d. Density

Que- Anemometer is used to measure

a. Wind direction

b. Wind velocity

d. Wind speed and time

Que- The instrument used to measure the speed of the wind is

a. Altimeter

b. Anemometer

c. Chronometer

d. Dosimeter

Que- The height of a geo-stationary satellite from the Earth's surface is approximately :

a. 36,000 km

b. 42,000 km

c. 30,000 km

d. None of these

Que- Why is weightlessness experienced while orbiting the earth in space ships ?

a. Inertia

b. Acceleration

c. Zero gravity

d. None of these

Que- In the case of bodies falling under gravity which of the following remains constant at a given place?

a. Kinetic energy

b. Potential energy

c. Acceleration

d. All the above

Que- The instrument used to see the distant objects on the Earth is

a. Terrestrial telescope

b. Astronomical telescope

c. Compound microscope

d. Simple microscope

Que- Intensity of gravitational field of earth is maximum at

a. Poles

b. Equator

c. Centre of earth

d. Surface

Que- An optically plane surface reflects a beam of light

a. As a parallel beam in one direction

b. As diffused beams in all directions

c. As parallel beams in all directions

d. As a diffused beam in one direction

Answer- As a parallel beam in one direction

Que- The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

a. 20 cm

b. 5 cm

c. 10 cm

d. 15 cm

Que- The type of mirrors used in the headlamp of cars is

a. Parabolic concave

b. Plane

c. Spherical convex

d. Cylindrical concave

Que- Shaving mirror is

a. Convex

b. Concave

c. Plane

d. Parabolic

Que- What changes will happen to a bowl of ice and water kept at exactly zero degree Celsius ?

a. All ice will melt

b. All water will become ice

c. No change will happen

d. Only some ice will melt

Que- Charles's law is based on

a. Solid

b. Liquid

c. Gas

d. None of the above

Que- The ''Greenhouse effect' is mainly due to increase in atmospheric

a. Ozone

b. Nitrogen

c. Sulphur dioxide

d. Carbon dioxide

Que- Thermohaline circulation is mainly due to

a. Cold, dense ocean water sinking and warmer water replacing it

b. Winds causing circulation of ocean water

c. Warmer, less dense water sinking in the ocean and cold water replacing it

d. Warm water being added to the ocean due to industial waste

Answer- Cold, dense ocean water sinking and warmer water replacing it

Que- Which of the following device is used to measure humidity?

a. Hydrometer

b. Hygrometer

c. Psycho Meter

d. Anemometer

Que- Which set of conditions represents the easiest way to liquify a gas ?

a. Low temperature and high pressure

b. High temperature and low pressure

c. Low temperature and low pressure

d. High temperature and high pressure

Answer- Low temperature and high pressure

Que- It is easier to roll a barrel full of coal tar than to pull it because

a. the full weight of the barrel comes into play when it is pulled

b. the rolling friction is much less than the sliding friction

c. more surface area of the barrel is in contact with the road when it is pulled

d. coal tar is a liquid and it flows in the barrel when it is rolled

Answer- the rolling friction is much less than the sliding friction

Que- Minimum number of unequal vectors which can give zero resultant are

a. two

b. three

c. four

d. more than four

Que- Intensity of sound has

a. an object existence

b. a subject existence

c. no existence

d. both subjective and objective existence

Que- Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from

a. east

b. west

c. northeast

d. southeast

Que- For a freely falling body, the sum of kinetic energy and potential energy is always

a. Zero

b. Unity

c. Same

d. Variable

Que- A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________

a. 50 J

b. 30 J

c. 20 J

d. 40 J

Que- If the velocity of a body is halved its kinetic energy ________

a. Become 4 times

b. Becomes 1/4 th

c. Is also doubled

d. Becomes half

Que- Solar energy is converted into chemical energy during

a. Transpiration

b. Photosynthesis

c. Diffusion

d. Osmosis

Que- In which of the following cases, kinetic energy is being used in performing work ?

a. Paddling the bicycle to cover a distance

b. Driving a car to cover a distance

c. Wind mill grinding wheat grain

d. Rowing a boat in the lake

Answer- Driving a car to cover a distance

Que- ML2T-2 is the dimensional formula for

a. moment of inertia

b. pressure

c. elasticity

d. couple acting on a body

Answer- couple acting on a body

Que- Solar eclipse will take place when

a. the sun is between the moon and the earth

b. the earth is between the moon and the sun

c. the moon is between the sun and the earth

d. the moon does not lie on the line joining the sun and the earth

Answer- the moon is between the sun and the earth

Que- Isotopes of an element contain

a. the same number of protons but different number of neutrons

b. the same number of neutrons but different number of protons

c. equal number of protons and electrons

d. equal number of nucleons

Answer- the same number of protons but different number of neutrons

Que- Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?

a. Scattering

b. Diffraction

c. Interference

d. Polarization

Que- The unit of energy in MKS system is

a. Joule

b. Ohm

c. Erg

d. Volt

Que- One light year is equal to

a. 2 trillion miles

b. 6 trillion miles

c. 8 trillion miles

d. 9 trillion miles

Que- Parsec is the unit of

a. Distance

b. Time

c. Intensity of light

d. Magnetic line

Que- One nanometer is equal to ________ meters.

a. 10 raised to the power (-3)

b. 10 raised to the power (-6)

c. 10 raised to the power (-9)

d. 10 raised to the power (-12)

Answer- 10 raised to the power (-9)

Que- The Length of the Day is determined in

a. Length of the hours

b. Length of the year

c. Astronomical units

d. Solar terms

Que- If a copper wire is increased to double its length, its resistance will become

a. Four times

b. One–fourth

c. Double

d. Half

Que- The filament of electric bulb is made up of :

a. Copper

b. Nichrome

d. Tungsten

Que- Full form of CFL used in place of electric bulbs is

a. Compact fluorescent lamp

b. Constantan filament lamp

c. Closed filament lamp

d. Closed fluorescent lamp

Que- Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?

a. 25 W

b. Both

c. 100 W

d. Neither

Que- 1 WH =

a. 360 joules

b. 36000 joules

c. 3600 joules

d. 36 joules

Que- Rainbow is seen after rain because of hanging molecules of water which act as

a. Lenses

b. Mirrors

c. Prisms

d. Slabs

Que- The information of brilliant colors in a thin soap film is a consequence of the phenomena of

a. Polarization and interference

b. Diffraction and dispersion

c. Multiple refraction and dispersion

d. Multiple reflection and interference

Que- Optic fibres are used in :

a. CAT scans

b. X-ray photos

c. Ultrasound scans

d. Endoscopy

Que- Purpose of an optical filter is to

a. Reflect lights of different colours

b. Dispense light into component colours

c. Refract light of different colours

d. Transmit or absorb light of different colours

Answer- Transmit or absorb light of different colours

Que- Parabolic mirrors are used in

b. Driving mirrors

c. Dentists mirros

d. Shaving mirros

Que- When a bullet is fired from a gun

a. The gun moves forward

b. The gun jumps up

c. The gun does not move

d. The gun recoils with the same momentum as the bullet

Answer- The gun recoils with the same momentum as the bullet

Que- The inability of a body to change its state of rest or uniform motion along a straight line is called its

a. Momentum

b. Velocity

c. Acceleration

d. Inertia

Que- The moment of inertia of a body does not depend upon its

a. Axis of rotation

b. Angular velocity

c. Form of mass

d. Distribution of mass

a. Inertia of motion

b. Frictional force

c. Moment of a force

d. Principle of moments

Que- What is the gravity of moon as compared to the Earth

a. 1/4 th of Earth

b. 1/5 th of Earth

c. 1/6 th of Earth

d. 1/8 th of Earth

Que- Gravitational force is maximum at which place

a. Poles

b. Tropic of cancer

c. Tropic of capricorn

d. Equator

Que- A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that

a. The rubber ball suffers greater change in momentum

b. The metal ball suffers greater change in momentum

c. Both suffer the same change in momentum

d. The initial momentum of the rubber ball is greater than that of the metal ball

Answer- The rubber ball suffers greater change in momentum

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

a. Behind him

b. In front of him

c. Into his hand

d. By his side

Que- Rate of change of momentum is

a. Area

b. Pressure

c. Force

d. Velocity

Que- Which law is also called law of inertia ?

a. Newton first law

b. Newton second law

c. Newton third law

d. All of above

Que- Which of the following scientific discoveries was made by C.V. Raman?

a. Inelastic scattering of light by molecules

b. Super Conductivity

c. Controlled nuclear fission

d. Cyclotron

Answer- Inelastic scattering of light by molecules

Que- Choose the most appropriate answer: Sir CV Raman was awarded Noble Prize for his work connected with which of the following phenomenon of radiation?

a. Scattering

b. Diffraction

c. Interference

d. Polarization

Que- Which of the following is/are part of the Classical Physics?

a. Optics

b. Thermodynamics

c. Both a and b

d. None

Que- General purpose utility gloves are

a. For surgeries

b. For cleaning procedures

c. For handling tubes

d. All of the above

Que- The theory of relativity is presented by which scientist

a. Albert Einstein

b. Isaac Newton

c. Stephen Hawking

d. Marie Curie

Que- The least penetrating power ray is

a. Gamma rays

b. Beta rays

c. Alpha rays

d. None of the above

Que- Gamma rays are emissions that have

a. Charge but no mass

b. Neither mass nor charge

c. Both mass and charge

d. Mass but no charge

Que- In the gamma decay of a nucleus

a. The mass number of the nucleus changes whereas its atomic number does not change

b. The mass number of the nucleus does not change whereas its atomic number changes

c. Both the mass number and the atomic number of the nucleus change

d. Neither the mass number nor the atomic number of the nucleus changes

Answer- Neither the mass number nor the atomic number of the nucleus changes

Que- Who among the following developed the technology of underground nuclear explosion ?

a. Dr. Homi J. Bhabha

b. Dr. Vikram Sarabhai

c. Dr. Raja Ramanna

d. Dr. P. K. Iyengar

Que- A radioactive substance does not undergo any change (in mass or charge) during

a. Gamma-emission

b. Oxidation

c. Alpha-emission

d. Beta-emission

Que- A thin oil film on a water surface appears coloured because of

a. Reflection

b. Interference

c. Diffraction

d. Polarization

Que- The blue colour of sky is due to

a. Reflection of sunlight

b. Refraction of sunlight

c. Scattering of shorter wavelengths of sunlight in the atmosphere

d. Scattering of longer wavelengths of sunlight in the atmosphere

Answer- Scattering of shorter wavelengths of sunlight in the atmosphere

Que- The phenomenon of light associated with the appearance of blue colour of the sky is

a. Interference

b. Reflection

c. Refraction

d. Scattering

Que- The sky appears blue because of

a. Atmospheric water vapour

b. Scattering of light

c. Reflection on sea water

d. Emision of blue wavelength by the sun

Que- Light scattering takes place in

a. Colloidal solutions

b. Acidic solutions

c. Electrolyte solutions

d. Basic solutions

Que- The sharpness of a television image is termed as its

a. Clarity

b. Colour

c. Resolution

d. Graphics

Que- Which of the following is the fastest communication channel?

a. Microwave

b. Optical fiber