11th Physics Material Tamil Medium. We covered all the 11th Physics Material Tamil Medium in this post for free so that you can practice well for the exam.
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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
(C) A thin ring
(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
(C) 1800 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
(C) 240 rpm
(D) 300 rpm
Option d - 300 rpm
Which of the following is a scalar quantity?
(a) Angular momentum
(b) Force
(c) Velocity
(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
(c) Distribution 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
(c) Velocity of molecules
(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
(c) Newton's law of cooling
(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
(c) Super Conductors
(d) Dielectrics
Option c - Super Conductors
It is difficult to cook rice -
(a) At the sea level
(b) Under a mine
(c) At the top of a mountain
(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
(c) 25°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
(c) Is deformed very easily
(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
(c) Adhesive force
(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
(c) Potential 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
(c) Elasticity as well as inertia
(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
(c) Low temperature
(d) Low viscosity
Option a - Low density
The Dimension MLT² corresponds to -
(a) Force
(b) Velocity
(c) Acceleration
(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
(c) Asbestos
(d) Celluloid
Option b - Mica
Remote-sensing device has an inbuilt source of -
(a) Gamma rays
(b) Ultra violet rays
(c) X-ray
(d) Infrared rays
Option d - Infrared rays
The buoyancy depends on -
(a) Mass of the body
(b) The shape of the body
(c) Mass of liquid displaced by 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
(c) Momentum
(d) Velocity
Option a - Potential Energy
The oil rises up in an oil lamp by the principle of -
(a) Gravitation
(b) Buoyancy
(c) Capillary
(d) Process of floating
Option c - Capillary
What is the natural and largest source of heat?
(a) Wood
(b) Moon
(c) Coal
(d) Sun
Option d - Sun
Law of electrical resistance was introduced by -
(a) Gauss
(b) Ohm
(c) Newton
(d) Faraday
Option a - Gauss
Tyndall effect is associated with which property of light?
(a) Suspension
(b) Reflection
(c) Dispersion
(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
(c) Yellow
(d) Red
Option d - Red
The North Pole of the earth's magnet is in the geographical -
(a) West
(b) East
(c) North
(d) South
Option d - South
Which of the following is not a primary color?
(a) Green
(b) Yellow
(c) Red
(d) Blue
Option b - Yellow
The S.I. unit of magnetic flux is -
(a) Weber
(b) Weber/m
(c) Weber/m²
(d) Weber - m
Option a - Weber
An object which absorbs all colors and reflects none appears -
(a) Blue
(b) White
(c) Black
(d) Grey
Option c - Black
The freezing point of fresh water is -
(a) 0°C
(b) 3°C
(c) 4°C
(d) 5°C
Option a - 0°C
a-particle is the nucleus of an atom of -
(a) Oxygen
(b) Helium
(c) Lithium
(d) Hydrogen
Option b - Helium
Tesla is a unit of magnetic -
(a) Moment
(b) Flux
(c) Field
(d) Induction
Option c - Field
The phenomenon which causes mirage is -
(a) Polarisation
(b) Interference
(c) Diffraction
(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
(c) Parabolic mirror
(d) Convex mirror
Option b - Concave mirror
Which of the following substances is magnetic?
(a) Silver
(b) Gold
(c) Iron
(d) Mercury
Option c - Iron
The image formed by a plane mirror is -
(a) Real
(b) Straight
(c) Imaginary
(d) Virtual
Option d - Virtual
A transformer works on the principle of -
(a) Generator
(b) Self Induction
(c) Mutual induction
(d) Inverter
Option c - Mutual induction
The radiant energy having the lowest energy is -
(a) UV rays
(b) Visible light
(c) Gamma rays
(d) Microwave radiation
Option d - Microwave radiation
Which of the following liquids is most viscous?
(a) Milk
(b) Water
(c) Oil
(d) Petrol
Option c - Oil
The colours of stars depend on their -
(a) Radius
(b) Atmospheric pressure
(c) Temperature
(d) Distance
Option c - Temperature
If a copper wire is increased to double its length, its resistance will become -
(a) Half
(b) Double
(c) One-fourth
(d) Four times
Option b - Double
The slope of a velocity-time graph represents -
(a) Distance
(b) Speed
(c) Acceleration
(d) Displacement
Option c - Acceleration
A saving mirror is -
(a) Plane
(b) Concave
(c) Convex
(d) Parabolic
Option b - Concave
An instrument that records earthquakes is -
(a) Seismograph
(b) Richter
(c) Hygrometer
(d) Lactometer
Option a - Seismograph
The filament of an electric bulb is made up of -
(a) Lead
(b) Nichrome
(c) Copper
(d) Tungsten
Option d - Tungsten
Planck's constant has the dimension of -
(a) Force
(b) Energy
(c) Angular momentum
(d) Linear momentum
Option b - Energy
A light year is a unit of -
(a) Time
(b) Speed of light
(c) Intensity of light
(d) Distance
Option d - Distance
Which of the following liquids has the least density?
(a) Petrol
(b) Mercury
(c) Salt water
(d) Fresh water
Option a - Petrol
Which of the following is used in ovens?
(a) UV rays
(b) Microwaves
(c) Radio waves
(d) X-rays
Option b - Microwaves
Which of the following is most elastic?
(a) Plastic
(b) Steel
(c) Rubber
(d) Wet clay
Option b - Steel
The sharpness of a television is termed as its -
(a) Colour
(b) Clarity
(c) Resolution
(d) Graphics
Option c - Resolution
Which one of the following has the highest value of specific heat?
(a) Water
(b) Lead
(c) Copper
(d) Glass
Option a - Water
The amount of matter in a ball of steel is its -
(a) Density
(b) Volume
(c) Mass
(d) Weight
Option c - Mass
In a nuclear reactor, which of the following is used as a fuel?
(a) Coal
(b) Radium
(c) Diesel
(d) Uranium
Option d - Uranium
Alternating current is converted into direct current by a -
(a) Dynamo
(b) Rectifier
(c) Transformer
(d) Oscillator
Option b - Rectifier
An instrument used to measure the force and velocity of the wind is -
(a) Audiometer
(b) Ammeter
(c) Altimeter
(d) Anemometer
Option d - Anemometer
The sudden fall of atmospheric pressure indicates -
(a) Rain
(b) Fair weather
(c) Storm
(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
(c) 6 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
(c) Potential energy
(d) Chemical energy
Option d - Chemical energy
Which colour of light shows maximum deviation when passed through a prism?
(a) Red
(b) Yellow
(c) Violet
(d) Green
Option c - Violet
Which of the following is the smallest unit of length?
(a) Micron
(b) Nanometer
(c) Fermimeter
(d) Angstram
Option c - Fermimeter
What apparatus is used to locate a submerged object?
(a) Sonar
(b) Radar
(c) Pulsar
(d) Quasar
Option a - Sonar
If the temperature of a place increases suddenly, the relative humidity-
(a) Increases
(b) Remains constant
(c) Fluctuates
(d) Decreases
Option d - Decreases
Who enunciated the laws of planetary motion?
(a) Isaac Newton
(b) Galileo
(c) Johannes Kepler
(d) Nicolaus Copernicus
Option c - Johannes Kepler
Light beam which is highly directional is called -
(a) Laser
(b) Maser
(c) Eraser
(d) Grazer
Option a - Laser
Which electromagnetic radiation is used for satellite communication?
(a) Microwave
(b) Infrared
(c) Ultra violet
(d) Millimeter Wave
Option a - Microwave
Conversion of sound energy into electrical energy is done by-
(a) Solar cell
(b) Gramophone
(c) Loudspeaker
(d) Microphone
Option d - Microphone
Blowing air with open pipe is an example of -
(a) Isobaric Process
(b) Isothermal Process
(c) Adiabatic Process
(d) Isochroic process
Option a - Isobaric Process
Distance of stars are measured in -
(a) Cosmic Kilometer
(b) Galactic Unit
(c) Light Year
(d) Stellar Mile
Option c - Light Year
The layer of atmosphere used for radio wave transmission is -
(a) Ionosphere
(b) Troposphere
(c) Chromosphere
(d) Stratosphere
Option a - Ionosphere
Shock-absorbers are usually made of steel as it -
(a) Has lower elasticity
(b) Has higher elasticity
(c) Is not brittle
(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
(c) Cold fusion
(d) Superconductivity
Option b - Nuclear fission
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