# Physics MCQ (Multiple Choice Questions) - SchoolingAxis

Que- The ''Choke' used with a tube light is basically

a. An inductor

b. A capacitor

c. A transformer

d. A resistor

Que- For photoelectric effect to take place, the metal used as the cathode should have ________

a. High melting point

b. Low melting point

c. Low work function

d. Low resistance

Que- Which phenomena shows the particle nature of light?

a. Diffraction

b. Interference

c. Photoelectric effect

d. Polarisation

Que- According to the quantum theory of light, the energy of light is carried in discrete units are called

a. Photoelectrons

b. Protons

c. Electrons

d. Photons

Que- Photon is the fundamental unit/quantum of

a. Gravitation

b. Electricity

c. Magnetism

d. Light

Que- If velocity is constant then acceleration is what?

a. Constant

b. Increasing

c. Zero

d. Infinite

Que- Acceleration is the rate of change of

a. Speed

b. Velocity

c. Jerk

d. Jounce

Que- Rate at which velocity changes over time?

a. Speed

b. Displacement

c. Acceleration

d. Jerk

Que- Who is the first person to define speed

a. Galileo

b. Newton

c. Kepler

d. Ptolemy

Que- For an object, the state of rest is considered to be the state of ________ speed.

a. Increasing

b. Decrease

c. Inverse

d. Zero

Que- How much calorie of energy is released by a boiled egg ?

a. 40

b. 50

c. 60

d. 77

Que- A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum:

a. Just after it is dropped

b. When it is just on the half-way

c. Just before it touches the ground

d. When it touches the ground

Answer- Just before it touches the ground

Que- A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:

a. 150 J

b. 100 J

c. 50 J

d. 75 J

Que- Gasoline is useful in cars because it has

a. Chemical potential energy

b. Electrical potential energy

c. Gravitational potential energy

d. Kinetic energy

Que- Electric Motor converts ________ energy to mechanical energy

a. Sound

b. Mechanical

c. Chemical

d. Electrical

Que- When all the forces and torques are balanced in a mechanical body it is said to be in

a. Equilibrium

b. Static

c. Buoyancy

d. None of the above

Que- Centrifugal force increases with

a. Temperature

b. Pressure

c. Acceleration

d. Humidity

Que- Sound of frequency below 20 Hz is called

a. audio sounds

b. infrasonic

c. ultrasonic

d. supersonics

Que- On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:

a. mercury is a metal.

b. density of mercury is greater than that of water.

c. cohesion of mercury is greater than its adhesion with glass.

d. cohesion of water is greater than its adhesion with glass.

Que- Suitable impurities are added to a semiconductor depending on its use. This is done in order to

a. increase its life

b. enable it to withstand higher voltages

c. increase its electrical conductivity

d. increase its electrical resistivity

Que- Stars twinkle because

a. the intensity of light emitted by them changes with time.

b. the distance of the stars from the earth changes with time.

c. the refractive index of the different layers of the earth's atmosphere changes continuously.

d. None of these

Answer- the refractive index of the different layers of the earth's atmosphere changes continuously.

Que- It takes much longer to cook food in the hills than in the plains, because

a. in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time

b. due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil

c. in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere

d. in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking

Answer- in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time

Que- The base of an electric iron is brightly polished mainly

a. To make it smooth and frictionless

b. To make it rust-proof

c. To reduce heat loss by radiation

d. To make it more durable

Que- A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

a. The floor and carpet are at different temperatures

b. The stone conveys the heat away from the feet more rapidly than the carpet

c. The carpet is a better conductor of heat than the stone

d. The human body maintains a constant temperature

Answer- The stone conveys the heat away from the feet more rapidly than the carpet

Que- Global warming is expected to result in

a. Increase in level of sea

b. Change in crop pattern

c. Change in coast line

d. All of the above

Que- Why two thin shirts can keep us warmer than a single thick shirt in winter ?

a. Two thin shirts become thicker so prevent transmission of heat

b. Air layer between two shirts works as good conductor

c. Air layer between two shirts behaves like insulating media

d. No radiation of heat takes place

Answer- Air layer between two shirts behaves like insulating media

Que- Sun's heat reaches us by

a. Conduction

b. Convection

d. Reflection

Que- Where is a transistor most likely to be found ?

a. Wrist watch

b. Fuse

c. Hearing aid

d. Fluorescent lamp

Que- Solids which conduct electricity at higher temperature but not at lower temperature are called

a. Super-conductor

b. Metallic-conductor

c. Semi-conductor

d. Insulator

Que- Which one among the following components can not be developed within an ''integrated circuit"?

a. Diode

b. Triode

c. Transformer

d. Transistor

Que- A metal semiconductor junction diode is called ________

a. Schottky diode

b. Photo diode

c. Tunnel diode

d. P-N Junction diode

Que- Universal gates are

a. AND and OR

b. OR and NOT

c. NAND and NOR

d. AND and XOR

Que- A piece of wood is held under water. The upthrust on it will be:

a. Equal to the weight of the wood

b. Less than weight of the wood

c. More than weight of the wood

d. Zero

Answer- Less than weight of the wood

Que- An egg sinks in soft water but floats in a concentrated solution of salt because

a. Egg absorbs salt from the solution and expands

b. Albumin dissolves in salt solution and egg becomes lighter

c. The density of salt solution exceeds the density of eggs

d. Water has high surface tension

Answer- The density of salt solution exceeds the density of eggs

Que- When a ship enters the sea from a river what will be the effect?

a. It lowers

b. It sways

c. It rises a little

d. It jolts

Que- Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

a. The gold piece will weigh more

b. The silver piece will weigh more

c. Both silver and gold pieces weigh equal

d. Weighing will depend on their masses

Answer- The silver piece will weigh more

Que- When a body is immersed in a liquid, the force acting on it is

a. Upthrust

b. Weight

c. Mass

d. Both (A) and (B)

Que- Fish and other aquatic creatures can live inside a deep frozen pond because

a. Fish are cold-blooded animals

b. Ice is a bad conductor of heat

c. There will always be water just beneath the ice level

d. They can adapt themselves to live in ice

Answer- There will always be water just beneath the ice level

Que- The density of a gas is maximum at

a. Low temperature, low pressure

b. Low temperature, high pressure

c. High temperature, low pressure

d. High temperature, high pressure

Que- Lakes freeze in cold countries in winter, leaving the water underneath at

a. 0°C

b. 0°F

c. 4°C

d. 4°F

Que- A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will

a. Remain straight

b. Bend towards right

c. Bend towards left

d. None of these

Que- Thermal expansion of materials arises from

a. Strong bonds

b. Thermal vibrations

c. Weak bonds

d. Asymmetry of potential energy curve

Answer- Asymmetry of potential energy curve

Que- The unit of force is a

a. Derived Unit

b. Basic Unit

c. Fundamental Unit

d. None of the above

Que- Atmospheric pressure exerted on earth is due to

a. Gravitational pull

b. Rotation of earth

c. Revolution of earth

d. Uneven heating of earth

Que- What is the SI unit of Force?

a. Pascal

b. Boyle

c. Newton

d. Watt

Que- What measures Air pressure?

a. Barkometer

b. Bolometer

c. Spectrometer

d. Barometer

Que- The rice is cooked more quickly in a pressure cooker because

a. It is covered.

b. Less quantity of water is used.

c. None of these

d. Water boils at a higher temperature under pressure.

Answer- Water boils at a higher temperature under pressure.

Que- A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan

a. Increases

b. Decreases

c. Remains the same

d. First increases and then decreases

Que- A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

a. The ball will travel towards the center of the circle and fall down

b. It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

c. It will fall down at the same place where the string breaks

d. None of these

Answer- It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

Que- A body moving in a circular path with a constant speed has a

a. Constant velocity

b. Constant acceleration

c. Constant kinetic energy

d. Constant displacement

Que- The point where total mass of a body is supposed to be concentrated is known as

b. Centre of mass

c. Centre of gravity

d. Centre of motion

Que- The angle in which a cricket ball should be hit to travel maximum horizontal distance is :

a. 60° with horizontal

b. 45° with horizontal

c. 30° with horizontal

d. 15° with horizontal

Que- Land is considered a resource because it

a. Is used to produce things

b. Requires labor to be useful

c. Is always available to use

d. Costs little or nothing to use

Answer- Is used to produce things

Que- What is the source of energy for the water cycle?

a. Rain water

b. Sun

c. Clouds

d. Animals

Que- Which of the following is a non renewable source of energy ?

a. Biogas

b. Solar

c. Wind

d. Coal

Que- Which resource is both renewable and inexpensive?

a. Sunlight

b. Coal

c. Gold

d. Minerals

Que- Sources of geothermal power are

a. Water

b. Earth's heat

c. Both A & B

d. None of the above

Que- Which alternative energy source is exhaustible?

a. Tidal energy

b. Wind energy

c. Solar energy

d. Geothermal energy

Que- Which of the following is a Non Renewable Resource of Energy?

a. Wind Power

b. Hydrogen Fuel

c. Natural Gas

d. Solar Energy

Que- Which of the following is a renewable resource of energy?

a. Hydrogen fuel

b. Wind energy

c. Solar energy

d. All of the above

Que- The group of solar cells joined together in a definite pattern is called a

a. Battery

b. Solar heater

c. Solar cooker

d. Solar cell panel

Que- Which of the following uses a Non Renewable Energy Source?

a. Wind Mill Power Plant

b. Hydro Electric Plant

c. Nuclear Power Plant

d. Tidal Power Plant

Que- Which planet has the lowest density?

a. Earth

b. Jupiter

c. Saturn

d. Neptune

Que- The sensation of weightlessness in a spacecraft in an orbit is due to the

a. Absence of gravity outside

b. Acceleration in the orbit which is equal to the acceleration due to gravity outside

c. Presence of gravity outside but not inside the spacecraft

d. Fact that spacecraft in the orbit has no energy

Answer- Acceleration in the orbit which is equal to the acceleration due to gravity outside

Que- The different colours of different stars are due to the variation of

a. Temperature

b. Pressure

c. Density

Que- Which of the following is correct about the properties of Gravitational Forces?

a. They are the strongest forces in nature

b. They observe inverse square law

c. Both a and b

d. None

Answer- They observe inverse square law

Que- In the absence of the earth's atmosphere, sky would appear

a. Blue

b. Deep red

c. White

d. Black

Que- Magnetic keepers are used to protect magnets from :

a. Earth's magnetic field

b. Effect of other magnets

c. Self-demagnetization

d. Demagnetization due to heating

Que- Which among the following is the fundamental quantity ?

a. Volume

b. Time

c. Velocity

d. Force

Que- A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance

a. Will increase

b. Will decrease

c. Does not change

d. Varies with the increase of depth of the immersion of the iron piece

Que- 1 amu is equivalent to

a. 1 eV

b. 931 eV

c. 931 KeV

d. 931 MeV

Que- 1 m/s equals ________ km/hr

a. 5/16

b. 16/5

c. 18/5

d. 5/18

Que- The dimensional formula for universal gravitational constant is

a. M 1L3T2

b. ML2T–2

c. M–2

d. M–1L3T–2

Que- Which one of the following physical quantities has the same dimensions as that of Planck's constant?

a. Linear momentum

b. Angular momentum

c. Force

d. Potential energy

Que- When a person sitting on a swing stands up on the swing, the frequency of oscillation

a. Decreases

b. Increases

c. Becomes infinite

d. Does not change

Que- A system exhibiting S.H.M. must possess

a. Elasticity as well as inertia

b. Elasticity, inertia and an external force

c. Elasticity only

d. Inertia only

Answer- Elasticity as well as inertia

Que- Which of the following is not a property of heavy water ?

a. Boiling point of heavy water is lower than that or ordinary water

b. Density of heavy water is higher than that of ordinary water

c. Freezing point of heavy water is higher than that of ordinary water

d. It produces corrosion

Answer- Boiling point of heavy water is lower than that or ordinary water

Que- Which of the following liquids is most viscous?

a. Oil

b. Milk

c. Water

d. Petrol

Que- Small bubbles are perfectly spherical because of

a. Gravity

b. Pressure

c. Viscosity

d. Surface tension

Que- Pitot tube is used to measure

a. Static pressure

b. Velocity at stagnation point

c. Stagnation pressure

d. Dynamic pressure

Que- A spherical ball made of steel when dropped in mercury container

a. Sink in mercury

b. Will be on the surface of mercury

c. Will be partly immersed mercury

d. Will dissolve in mercury

Answer- Will be on the surface of mercury

Que- Reading of a barometer going down is an indication of

a. Storm

b. Rainfall

c. Snow

d. Intense heat

Que- Increased wind speed is accompanied by a reduced air ________

a. Humidity

b. Pressure

c. Density

d. Aridity

Que- A vacuum cleaner works on the principle of pressure difference. On the moon it will

a. Work as efficiently as on the earth

b. Not work at all

c. Work with reduced efficiency

d. Work with increased efficiency

Que- Middle latitude cyclones are fueled by?

a. Air high in the atmosphere

b. Polar continental air masses

c. Energy from falling precipitation

d. All of the above

Answer- Air high in the atmosphere

Que- Skating on ice is possible because

a. The surface of ice is smooth

b. Ice is cold

c. The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water

d. The pressure on the ice due to skate raises its melting point

Answer- The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water

Que- The wavelength of a wave is the distance between

a. Crest and Trough

b. Crest and Crest

c. Trough and Trough

d. Both B & C

Que- Longitudinal waves cannot travel through

a. Vacuum

b. Solid

c. Liquid

d. Gas

Que- Flight Recorder is technically called :

a. Dark box

b. Blind box

c. Black box

d. Altitude meter

Que- A gradual increase in loudness is known as

a. Crescendo

b. Timbre

c. Fortissimo

d. None of the above

Que- Which of the following property of sound is affected by change in air temperature?

a. Frequency

b. Intensity

c. Amplitude

d. Wavelength

Que- Refrigeration is a process which

a. Kills bacteria

b. Slows down the bacterial growth

c. Inactivates the bacteria

d. Plasmolyses the bacteria

Answer- Slows down the bacterial growth

Que- Blowing Air with open pipe is an example of :

a. Isothermal process

b. Isochroric process

c. Isobaric process

Que- Which of the following is not reversible?

a. Joule effect

b. Peltier effect

c. Seebeck effect

d. Thomson effect

Que- In a diesel engine the high temperature needed to ignite the fuel is achieved by

a. Using heat from exhaust

b. The battery

c. Compressing air in the cylinders

d. An electrical spark

Answer- Compressing air in the cylinders

Que- Heat transfer horizontally within the atmosphere is called

a. Conduction

b. Convection

c. Absorption

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

a. metals have higher thermal capacity than plastics

b. plastics have a lower density than metals

c. metals are good conductor of heat

d. plastics have a higher thermal conductivity than metals

Answer- metals are good conductor of heat

Que- Intensity of sound at a point is ____ its distance from the source.

a. directly proportional to

b. inversely proportional to

c. directly proportional to square of

d. inversely proportional to square of

Answer- inversely proportional to square of

Que- Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

a. at sea level

b. at the top of Mt. Everest

c. at a place in a valley below sea level

d. in an aeroplane flying at a height of 10,000 m with inside pressure maintained at the sea level

Answer- at a place in a valley below sea level

Que- Radio telescopes are better than optical telescopes because

a. they can detect faint galaxies which no optical telescope can

b. they can work even in cloudy conditions

c. they can work during the day and night

d. All of the above