# Physics MCQ (Multiple Choice Questions) - SchoolingAxis

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

a. Chromosphere

b. Troposphere

c. Ionosphere

d. Stratosphere

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

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

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

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

a. Pyrometer

b. Thermocouple

c. Thermometer

d. Thermistor

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

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

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.

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

Que- Heat flows as a result of difference of ________

a. Temperature

b. Density

c. Mass

d. Volume

Que- Light beam which is highly directional is called:

a. Eraser

b. Grazer

c. Maser

d. Laser

Que- Speed of light is maximum in ________

a. Vacuum

b. Solids

c. Liquids

d. Gases

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

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

a. Water

b. Vaccum

c. Air

d. 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

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

a. Phiji

b. Fusis

c. Phusik

d. None of the above

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

c. Haris Christian Oersted

d. Isaac Newton

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

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

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

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

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

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

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

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

Que- Which color deviates highest when passing through a Prism

a. Indigo

b. Green

c. Violet

d. Orange

Que- A pond of water appears less deep due to

a. Reflection

b. Diffraction

c. Refraction

d. Polarisation

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

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

a. Surface

b. Normal

c. Tangent

d. Reflected ray

Que- A periscope works by the principle of

a. Total internal reflection

b. Refraction

c. Diffraction

d. Reflection

Que- A periscope works on the principle of

a. Refraction

b. Total internal reflection

c. Diffraction

d. 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

Que- Hydraulic brakes work on the principle of

a. Thomson's law

b. Newton's law

c. Bernoulli's theorem

d. 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

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

Que- Sound cannot pass through

a. Water

b. Steel

c. Air

d. Vacuum

Que- Sound waves cannot travel in

a. Vacuum

b. Water

c. Glass

d. Hydrogen gas

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

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

Que- Light travels slowest in

a. Glass

b. Water

c. Air

d. Vacuum

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

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

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

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

Answer- Land covered with fresh snow

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

a. AMBULANCE

b. ECNALUBMA

c. AMBULA CE

d. AWBULANCE

Que- Convex mirror is generally used in ________

a. Solar cookers

b. Opthalmoscope

d. Rear view mirror

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

a. Electric potential

b. Electrical conductance

c. Magnetic flux

d. Refractive index

Que- Hydroscope is an instrument that shows changes in:

a. Sound under water

b. Atmospheric humidity

c. Density of liquid

d. None of these

Que- Unit of impedance is ________

a. Ohm

b. Henry

c. Tesla

d. Hertz

Que- Stress can be defined as ________ quantity.

a. Scalar

b. Vector

c. Phasor

d. 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

Que- Which sources produce alternating current (AC)?

a. Solar power plants

b. Hydro-electric generators

c. Batteries

d. All of the above

Que- Alternating current is converted into direct current by a

a. Transformer

b. Dynamo

c. Oscillator

d. 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

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

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

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

a. Acceleration

b. Density

c. Displacement

d. Impulse

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

a. Speed

b. Velocity

c. Torque

d. Displacement

Que- These waves cannot be transmitted through vacuum.

a. Light

b. Sound

c. Heat

d. Electromagnetic

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

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

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

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

a. Centrifugation

b. Chromatography

d. All the above

Que- The radiant energy having lowest energy is

a. Gamma rays

b. UV rays

c. Visible light

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

a. Atomic emission

b. Atomic absorption

c. Electron emission

d. Electron absorption

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

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

a. Alpha

b. Beta

c. Gamma

d. All of the above

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

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

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

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

a. Insolation

c. Conduction

d. Convection

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

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

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

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

Que- The propagation of sound waves in a gas involves

b. Isothermal compression and rarefaction

c. Isochoric compression and rarefaction

d. Isobaric 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

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

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