11th Physics Material Tamil Medium Students 2025

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11th Physics Quiz for Students

The rotational kinetic energy and translational kinetic energy of the rolling body are equal. The body is :

(A) A sphere

(B) A disc

(D) A rod

Option c - A thin ring

An automobile engine develops (60x3.14) kW of power when it is rotating at a speed of 1800 rev/min. The torque it can transfer to the wheel is :

(A) 10³ Nm

(B) 60x3.14 Nm

(D) 1.8x10³ Nm

Option a - 10³ Nm

A ballet dancer spins about a vertical axis at 180 rpm with her arms outstretched. When she folds her arms moment of inertia about the same axis decreases by 40%. Her new rpm speed will be :

(A) Same as before

(B) 120 rpm

(D) 300 rpm

Option d - 300 rpm

Which of the following is a scalar quantity?

(a) Angular momentum

(b) force

(d) Electrostatic potential

Option d - Electrostatic potential

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

(a) Angular velocity

(b) Form of Mass

(d) Axis of rotation

Option a - Angular velocity

The average Kinetic energy of the Molecule of an ideal gas is directly proportional to -

(a) Mass of molecules

(b) Absolute temperature of the gas

(d) Temperature of Environment

Option b - Absolute temperature of the gas

The first law of Thermodynamics is simply the case of -

(a) Charle's law

(b) The law of Heat exchange

(d) The law of conservation

Option d - The law of conservation

Certain substances lose their electrical resistance completely at super low temperature. Such substances are called -

(a) Semi-Conductors

(b) Perfect Conductors

(d) Dielectrics

Option c - Super Conductors

It is difficult to cook rice -

(a) At the sea level

(b) Under a mine

(d) Same anywhere

Option c - At the top of a mountain

The density of water is 1g/cc. This is strictly valid at -

(a) 0°C

(b) 4°C

(d) 100°C

Option b - 4°C

Steel is more elastic than rubber because it -

(a) Is never deformed

(b) Is harder than rubber

(d) Requires large deforming force

Option c - Is deformed very easily

A needle or a pin floats on the surface of water because of -

(a) Surface energy

(b) Surface tension

(d) Viscosity

Option b - Surface tension

The work done by the string of a simple pendulum during one complete Oscillation is equal to -

(a) Zero

(b) Kinetic energy of the pendulum

(d) Total energy of the pendulum

Option a - Zero

A system exhibiting Simple Harmonic motion (S.H.M.) must possess -

(a) Inertia only

(b) Elasticity only

(d) Elasticity, inertia, and an external force

Option c - Elasticity as well as inertia

Clouds float in the Atmosphere because of their -

(a) Low density

(b) Low pressure

(d) Low viscosity

Option a - Low density

The Dimension MLT² corresponds to -

(a) force

(b) Velocity

(d) work done

Option a - force

Which of the following is a good conductor of Heat but a bad conductor of Electricity?

(a) Rubber

(b) Mica

(d) Celluloid

Option b - Mica

Remote-sensing device has an inbuilt source of -

(a) Gamma rays

(b) Ultra violet rays

(d) Infrared rays

Option d - Infrared rays

The buoyancy depends on -

(a) Mass of the body

(b) The shape of the body

(d) Depth to which the body is immersed

Option c - Mass of liquid displaced by body

A moving body may not have which of the following?

(a) Potential energy

(b) Kinetic energy

(d) Velocity

Option a - Potential energy

The oil rises up in an oil lamp by the principle of -

(a) Gravitation

(b) Buoyancy

(d) Process of floating

Option c - Capillary

What is the natural and largest source of Heat?

(a) Wood

(b) Moon

(d) Sun

Option d - Sun

Law of electrical resistance was introduced by -

(a) Gauss

(b) Ohm

(d) Faraday

Option a - Gauss

Tyndall effect is associated with which property of Light?

(a) Suspension

(b) Reflection

(d) Scattering of Light

Option d - Scattering of Light

Which of the following colors has the longest wavelength in the visible Spectrum?

(a) Violet

(b) Green

(d) Red

Option d - Red

The North Pole of the Earth's magnet is in the geographical -

(a) West

(b) East

(d) South

Option d - South

Which of the following is not a primary color?

(a) Green

(b) Yellow

(d) Blue

Option b - Yellow

The S.I. unit of magnetic flux is -

(a) Weber

(b) Weber/m

(d) Weber - m

Option a - Weber

An object which absorbs all colors and reflects none appears -

(a) Blue

(b) White

(d) Grey

Option c - Black

The freezing point of fresh water is -

(a) 0°C

(b) 3°C

(d) 5°C

Option a - 0°C

a-particle is the nucleus of an Atom of -

(a) Oxygen

(b) Helium

(d) Hydrogen

Option b - Helium

Tesla is a unit of magnetic -

(a) Moment

(b) Flux

(d) Induction

Option c - Field

The phenomenon which causes mirage is -

(a) Polarisation

(b) Interference

(d) Total internal reflection

Option d - Total internal reflection

Which type of mirror is used in the headlights of vehicles?

(a) Plane mirror

(b) Concave mirror

(d) Convex mirror

Option b - Concave mirror

Which of the following substances is magnetic?

(a) Silver

(b) Gold

(d) Mercury

Option c - Iron

The image formed by a plane mirror is -

(a) Real

(b) Straight

(d) Virtual

Option d - Virtual

A transformer works on the principle of -

(a) Generator

(b) Self Induction

(d) Inverter

Option c - Mutual induction

The radiant energy having the lowest energy is -

(a) UV rays

(b) Visible Light

(d) Microwave radiation

Option d - Microwave radiation

Which of the following liquids is most viscous?

(a) Milk

(b) Water

(d) Petrol

Option c - Oil

The colours of stars depend on their -

(a) Radius

(b) Atmospheric pressure

(d) Distance

Option c - Temperature

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

(a) Half

(b) Double

(d) Four times

Option b - Double

The slope of a velocity-time graph represents -

(a) Distance

(b) Speed

(d) Displacement

Option c - Acceleration

A saving mirror is -

(a) Plane

(b) Concave

(d) Parabolic

Option b - Concave

An instrument that records earthquakes is -

(a) Seismograph

(b) Richter

(d) Lactometer

Option a - Seismograph

The filament of an electric bulb is made up of -

(a) Lead

(b) Nichrome

(d) Tungsten

Option d - Tungsten

Planck's constant has the dimension of -

(a) force

(b) Energy

(d) Linear momentum

Option b - Energy

A Light year is a unit of -

(a) Time

(b) Speed of Light

(d) Distance

Option d - Distance

Which of the following liquids has the least density?

(a) Petrol

(b) Mercury

(d) Fresh water

Option a - Petrol

Which of the following is used in ovens?

(a) UV rays

(b) Microwaves

(d) X-rays

Option b - Microwaves

Which of the following is most elastic?

(a) Plastic

(b) Steel

(d) Wet clay

Option b - Steel

The sharpness of a television is termed as its -

(a) Colour

(b) Clarity

(d) Graphics

Option c - Resolution

Which one of the following has the highest value of specific Heat?

(a) Water

(b) Lead

(d) Glass

Option a - Water

The amount of Matter in a ball of steel is its -

(a) Density

(b) Volume

(d) Weight

Option c - Mass

In a nuclear reactor, which of the following is used as a fuel?

(a) Coal

(b) Radium

(d) Uranium

Option d - Uranium

Alternating Current is converted into direct current by a -

(a) Dynamo

(b) Rectifier

(d) Oscillator

Option b - Rectifier

An instrument used to measure the force and velocity of the wind is -

(a) Audiometer

(b) Ammeter

(d) Anemometer

Option d - Anemometer

The sudden fall of atmospheric pressure indicates -

(a) Rain

(b) Fair weather

(d) Cold weather

Option c - Storm

What is the minimum escape velocity of a rocket to be launched into space?

(a) 5 Km/sec

(b) 11 Km/sec

(d) 15 Km/sec

Option b - 11 Km/sec

In a rechargeable cell, what kind of energy is stored within the cell?

(a) Kinetic energy

(b) Electrical energy

(d) Chemical energy

Option d - Chemical energy

Which colour of Light shows maximum deviation when passed through a prism?

(a) Red

(b) Yellow

(d) Green

Option c - Violet

Which of the following is the smallest unit of length?

(a) Micron

(b) Nanometer

(d) Angstram

Option c - Fermimeter

What apparatus is used to locate a submerged object?

(a) Sonar

(b) Radar

(d) Quasar

Option a - Sonar

If the temperature of a place increases suddenly, the relative humidity-

(a) Increases

(b) Remains constant

(d) Decreases

Option d - Decreases

Who enunciated the laws of planetary motion?

(a) Isaac Newton

(b) Galileo

(d) Nicolaus Copernicus

Option c - Johannes Kepler

Light beam which is highly directional is called -

(a) Laser

(b) Maser

(d) Grazer

Option a - Laser

Which electromagnetic radiation is used for satellite Communication?

(a) Microwave

(b) Infrared

(d) Millimeter wave

Option a - Microwave

Conversion of sound energy into electrical energy is done by-

(a) Solar cell

(b) Gramophone

(d) Microphone

Option d - Microphone

Blowing air with open pipe is an example of -

(a) Isobaric Process

(b) Isothermal Process

(d) Isochroic process

Option a - Isobaric Process

Distance of stars are measured in -

(a) Cosmic Kilometer

(b) Galactic Unit

(d) Stellar Mile

Option c - Light Year

The layer of Atmosphere used for radio wave transmission is -

(a) Ionosphere

(b) Troposphere

(d) Stratosphere

Option a - Ionosphere

Shock-absorbers are usually made of steel as it -

(a) Has lower elasticity

(b) Has higher elasticity

(d) Has no ductile property

Option b - Has higher elasticity

Nuclear reactors used to produce Electricity are based on-

(a) Nuclear fusion

(b) Nuclear fission

(d) Superconductivity

Option b - Nuclear fission

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