TNPSC - Physics Exam material Part 4
Physics Exam material for TNPSC - PART 4
Printing for the blind was introduced by --- Micheal Faraday
The filament of an electric bulb is made of --- Carbon
The planet near to the sun --- Mercury
Crystal dynamics was invented by --- C.V.Raman
How to foodstuffs remain fresh in refrigerator --- by preventing fermentation due to very low temperature
Television was invented by --- J.L.Baird
The one used in the preparation of lenses and prisms --- Flint glass
When the mass and velocity are doubled the kinetic energy will --- increase 8 times
Colour formation in thin films is due to ---- Interference
The power of a lens is measured in --- dioptre
Photometers are instruments used to measure --- intensity comparison between different light sources
Rays from the head light of a car is rendered parallel by --- concave lens infront of the light
Printing for the blind was introduced by --- Micheal Faraday
The filament of an electric bulb is made of --- Carbon
The planet near to the sun --- Mercury
Crystal dynamics was invented by --- C.V.Raman
How to foodstuffs remain fresh in refrigerator --- by preventing fermentation due to very low temperature
Television was invented by --- J.L.Baird
The one used in the preparation of lenses and prisms --- Flint glass
When the mass and velocity are doubled the kinetic energy will --- increase 8 times
Colour formation in thin films is due to ---- Interference
The power of a lens is measured in --- dioptre
Photometers are instruments used to measure --- intensity comparison between different light sources
Rays from the head light of a car is rendered parallel by --- concave lens infront of the light
The diameter of the aperture of a camera is doubled. To compensate this the aperture time shutter should be --- made 1/2 times
Excited atoms gives rise to --- Line spectrum
The wheel of a forward moving vehicle has 8 supporting spokes. It is photo graphed on a motion picture film which runs at speed of 24 films per second. The wheel appears to be in the film, if the speed of rotation/sec. of the wheel is ---- 3
Laser is a ---- coherent waves
Transfer of heat by molecular collision is ---- conduction
The specific volume of water is maximum at --- 4oC
In an Isothermal process which quantity remains constant ? --- temperature
Electron - volt is a unit to measure ---- energy
Which instrument can be used to determine the thickness of a piece of paper ? --- Screw gauge
Which condition is favourable for the formation of dew? --- hot day followed by a cold night
Doppler effect in sound produces apparent change in --- frequency
Boyle's law states the relationship between --- pressure and volume
Which one of the following process is used to purify a soluble solid --- Crystallisation
Which one of the following properties of a liquid does not affect its rate of evaporation? --- Volume
Which one of the following involves two change of state ? ---- Distillation
Who is the scientist in whose honor the "chandra" x - ray telescope has been named? --- Subramanyan Chandra Sekar
The mass of a body on earth is 100kg. (acceleration due to gravity, ge = 10m/s2). If acceleration due to gravity on moon is (ge/6), then the mass of the body on the moon is --- 100kg
In an atom, the order of filling up of the orbitals is governed by --- Aufbau principle
A simple pendulum is set into oscillation, then --- in each cycle the bob attains a given velocity twice
Both Acceleration and velocity of the bob are zero when it reaches its extreme position during its oscillation.
The amplitude of oscillation of the simple pendulum decreases with time.
A radio active substance has a half life of four months. 3/4 of the substance would decay in --- 8 months
Two wires have their lengths, diameters and resitivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resisitance of the thicker wire shall be --- 10 ohms
Important Points ;
A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of water
Which one is the following in not radio active? --- Zirconium
When light rays pass from air to glass , the variables affected are --- wavelength and velocity
In a nuclear reactor, self - sustained chain reaction is possible, because --- more neutrons are released in each of the fission reactions.
The neutrons immediately take part in the fission process
fast neutrons are slowed down by graphite
When water is heated from 0oC to 10oC , its ---- volume first decreases and then increases
Important Points
Zero mass --- Photon
Fractional charge --- Quark
Fractional spin --- Neutrino
Integral spin --- Positron
Audio cassettes are coated with --- iron oxide
Why do we see bubbles coming out when a brick is immersed in water? ---- the density of brick is greater than the density of water
When does a lunar eclipse occur? --- when the earth comes between the sun and the moon
The spherical shape of rain drops is due to the property of --- Surface Tension
Halley's comet moves in an Elliptical path in its orbit around the earth.
At 0oC density of ice 0.96 of water. If 1 Cu.m. of water is solidified at 0oC . we can infer : Ice will float at 0oC in water, half submerged and half above the surface of water
The use of Ultrasonic waves can give us much protection from the harmful house hold insects and pets.
The angle between the moon and the sun would be ---- 90o when measured from earth on a half-moon night.
What would be the mean average voltage of the sinusoidal current, if an instrument measures the voltage of 50Hz sinusoidal current as 220V ? --- Zero
Why does a solar cooker have a cover made of glass? --- The glass allows heat radiation from the sun into the cooker but not out of it.
Soap makes the water easier to wash clothes because it --- decreases its surface tension
In a barometer, if water is used in place mercury, that the length of the barometer tube has to be --- increased
A liquid boils when its internal vapour is --- equal to total external pressure on its surface
Newtons law of gravitation is --- universal
What kind of energy works when a watch spring is wound up? --- Potential energy
For an elastic body, when is the ratio of the stress to strain produced known as ? --- Modulus of elasticity
Which of the following principles is used in firing rockets? --- Newtons third law of motion
When a force is applied it gives an impulse which is equal to --- change in momentum
Which of the following is Not a scalar quantity ? --- Velocity
Arrange the following colours in increasing order of wavelength --- orange, indigo, yellow and violet
A bucket immersed in water is felt lighter because of --- Archimedes principle
Velocity of body is --- the rate of the change of its position in a definite direction
Dyne is a unit of --- force
A body is said t o be moving with a uniform acceleration when its --- velocity changes at a uniform rate
A stone tied to a string when whirled in a circular path goes off tangentially when left free because of --- directional inertia
The working of the quartz crystal in the watch is based on the --- Piezo-electric effect
Which one of the following is not an astronomical object ? --- Brittle star
When there is depletion of ozone in the stratosphere the wavelength of radiation striking the earths surface will be --- 10-17m
The solar eclipse achieves totality only in limited geographical regions because --- the size of the shadow of the moon on the earth is small compared to the cross section of the earth
Why is it recommended that people should not use charcoal or gas stoves in closed rooms? --- it can cause carbon monoxide poisoning
Which one of the following is used for dating archaelogical specimens in wood, bones and shells ? --- Carbon - 14
Which is not a terrestrial planet having hard surface? --- Jupiter
The half - life of a radio active element is 5 years. The fraction of the radioactive substance that remains after 20 years is --- 1/16
A corked bottle full of water when frozen will break because --- the volume of water increases on freezing
Which one of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure ? --- f-22, 1/60
The basic reason for the extraordinary sparkle of a suitably cut the diamond is that --- It has a very high refractive index
In a electronic watch, the component corresponding to pendulum of a pendulum clock is a --- Crystal oscillator
If a gas is compressed to half its original volume at 27oC, to what temperature should it be heated to make it occupy its original volume ? --- 327oC
A man jumped at a speed of 5 metres per second from a stationary boat and the boat moved off with the speed of 0.5 metre per second. How many times is the mass of the boat greater than that of the man? --- 10 times
The acceleration due to gravity of a catastrophic earthquake will be --- 980 cm/sec2
The colour of a star is an indication of its --- temperature
The speed of light will be minimum while passing through --- glass
The pitch of the voice of women in general --- higher than that of men
The colour of an opaque object is due to the colour it --- reflects
Suppose a rocket ship is receding from the earth at a speed of 1/10 of velocity of light. A light in the rocket ship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth ? --- yellow
Cryogenic engines find applications in --- rocket technology
The difference between a nuclear reactor and an atomic bomb is that --- the chain reaction in nuclear reactor is controlled
Optical fibre works on the principle of --- Total internal reflection
An air bubble in water will act like a --- Concave lens
A meteor is --- a piece of matter which has entered the earths atmosphere from outer space
When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in --- quality only
The normal temperature of human body on the kelvin scale is --- 310
Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not? --- Seintilation counter
Transformer is useful for stepping up or stepping down voltages
The amplitude of oscillation of the simple pendulum decreases with time.
A radio active substance has a half life of four months. 3/4 of the substance would decay in --- 8 months
Two wires have their lengths, diameters and resitivities, all in the ratio of 1 : 2. If the resistance of the thinner wire is 10 ohms, the resisitance of the thicker wire shall be --- 10 ohms
Important Points ;
A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of water
Which one is the following in not radio active? --- Zirconium
When light rays pass from air to glass , the variables affected are --- wavelength and velocity
In a nuclear reactor, self - sustained chain reaction is possible, because --- more neutrons are released in each of the fission reactions.
The neutrons immediately take part in the fission process
fast neutrons are slowed down by graphite
When water is heated from 0oC to 10oC , its ---- volume first decreases and then increases
Important Points
Zero mass --- Photon
Fractional charge --- Quark
Fractional spin --- Neutrino
Integral spin --- Positron
Audio cassettes are coated with --- iron oxide
Why do we see bubbles coming out when a brick is immersed in water? ---- the density of brick is greater than the density of water
When does a lunar eclipse occur? --- when the earth comes between the sun and the moon
The spherical shape of rain drops is due to the property of --- Surface Tension
Halley's comet moves in an Elliptical path in its orbit around the earth.
At 0oC density of ice 0.96 of water. If 1 Cu.m. of water is solidified at 0oC . we can infer : Ice will float at 0oC in water, half submerged and half above the surface of water
The use of Ultrasonic waves can give us much protection from the harmful house hold insects and pets.
The angle between the moon and the sun would be ---- 90o when measured from earth on a half-moon night.
What would be the mean average voltage of the sinusoidal current, if an instrument measures the voltage of 50Hz sinusoidal current as 220V ? --- Zero
Why does a solar cooker have a cover made of glass? --- The glass allows heat radiation from the sun into the cooker but not out of it.
Soap makes the water easier to wash clothes because it --- decreases its surface tension
In a barometer, if water is used in place mercury, that the length of the barometer tube has to be --- increased
A liquid boils when its internal vapour is --- equal to total external pressure on its surface
Newtons law of gravitation is --- universal
What kind of energy works when a watch spring is wound up? --- Potential energy
For an elastic body, when is the ratio of the stress to strain produced known as ? --- Modulus of elasticity
Which of the following principles is used in firing rockets? --- Newtons third law of motion
When a force is applied it gives an impulse which is equal to --- change in momentum
Which of the following is Not a scalar quantity ? --- Velocity
Arrange the following colours in increasing order of wavelength --- orange, indigo, yellow and violet
A bucket immersed in water is felt lighter because of --- Archimedes principle
Velocity of body is --- the rate of the change of its position in a definite direction
Dyne is a unit of --- force
A body is said t o be moving with a uniform acceleration when its --- velocity changes at a uniform rate
A stone tied to a string when whirled in a circular path goes off tangentially when left free because of --- directional inertia
The working of the quartz crystal in the watch is based on the --- Piezo-electric effect
Which one of the following is not an astronomical object ? --- Brittle star
When there is depletion of ozone in the stratosphere the wavelength of radiation striking the earths surface will be --- 10-17m
The solar eclipse achieves totality only in limited geographical regions because --- the size of the shadow of the moon on the earth is small compared to the cross section of the earth
Why is it recommended that people should not use charcoal or gas stoves in closed rooms? --- it can cause carbon monoxide poisoning
Which one of the following is used for dating archaelogical specimens in wood, bones and shells ? --- Carbon - 14
Which is not a terrestrial planet having hard surface? --- Jupiter
The half - life of a radio active element is 5 years. The fraction of the radioactive substance that remains after 20 years is --- 1/16
A corked bottle full of water when frozen will break because --- the volume of water increases on freezing
Which one of the following combinations of aperture and shutter speed of a camera will allow the maximum exposure ? --- f-22, 1/60
The basic reason for the extraordinary sparkle of a suitably cut the diamond is that --- It has a very high refractive index
In a electronic watch, the component corresponding to pendulum of a pendulum clock is a --- Crystal oscillator
If a gas is compressed to half its original volume at 27oC, to what temperature should it be heated to make it occupy its original volume ? --- 327oC
A man jumped at a speed of 5 metres per second from a stationary boat and the boat moved off with the speed of 0.5 metre per second. How many times is the mass of the boat greater than that of the man? --- 10 times
The acceleration due to gravity of a catastrophic earthquake will be --- 980 cm/sec2
The colour of a star is an indication of its --- temperature
The speed of light will be minimum while passing through --- glass
The pitch of the voice of women in general --- higher than that of men
The colour of an opaque object is due to the colour it --- reflects
Suppose a rocket ship is receding from the earth at a speed of 1/10 of velocity of light. A light in the rocket ship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth ? --- yellow
Cryogenic engines find applications in --- rocket technology
The difference between a nuclear reactor and an atomic bomb is that --- the chain reaction in nuclear reactor is controlled
Optical fibre works on the principle of --- Total internal reflection
An air bubble in water will act like a --- Concave lens
A meteor is --- a piece of matter which has entered the earths atmosphere from outer space
When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in --- quality only
The normal temperature of human body on the kelvin scale is --- 310
Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not? --- Seintilation counter
Transformer is useful for stepping up or stepping down voltages
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